Luận án Tính dễ tổn thương và chiến lược thích ứng biến đổi khí hậu trong sinh kế của người dân tộc Khmer ở đồng bằng sông Cửu Long
Bên cạnh, những đóng góp nhất định về mặt lý luận và thực tiễn trong lĩnh vực
nghiên cứu về tính DBTT về sinh kế và chiến lược thích ứng của các hộ gia đình người
Khmer ở ĐBSCL trong bối cảnh BĐKH, nhưng luận án hiện vẫn có một số hạn chế tồn
tại do nhiều nguyên nhân khách quan và chủ quan, cụ thể:
Thứ nhất, phạm vi nghiên cứu của luận án còn hạn chế. Hiện nay, khu vực
ĐBSCL đã và đang phải đối mặt với những tác động tiêu cực của BĐKH gây ra, bao
gồm các thách thức lớn liên quan đến vấn đề nguồn nước, hạn hán, xâm nhập mặn, xói
lở bờ biển, bão, lũ và những tác động tiêu cực khác của BĐKH. Tuy nhiên, nghiên cứu
chỉ tập trung chủ yếu vào tác động của hạn hán, xâm nhập mặn và thời tiết bất thường,
mà chưa nghiên cứu các loại hình thái tác động khác.
Thứ hai, thời gian thu thập dữ liệu sơ cấp bắt đầu tháng 7/2020, đây là mốc thời
gian nước ta vừa trải qua thời gian giãn cách toàn xã hội do đại dịch Covid-19 bùng phát.
Do đó, nhiều nhà máy, công ty phải đóng cửa hoặc cắt giảm lao động nên nhiều lao động,
đặc biệt là thanh niên phải di chuyển về quê sinh sống. Bên cạnh đó, một số bộ phận người
dân do ảnh hưởng tâm lý sau đợt dịch bệnh Covid-19 còn e ngại và chưa có ý định di
chuyển về các thành phố làm việc trở lại sau dịch. Chính vì vậy, thời điểm khảo sát lực
lượng lao động nông thôn có sự gia tăng và dư thừa lao động, đặc biệt là lĩnh vực phi nông
nghiệp, làm gia tăng áp lực sinh kế của các hộ gia đình Khmer. Do đó, bối cảnh tổn thương
của nghiên cứu không chỉ có tác động của BĐKH mà còn thêm ảnh hưởng của dịch bệnh
Covid-19, nên tính DBTT về sinh kế của hộ gia đình Khmer ở ĐBSCL được đo lường có
khuynh hướng khuếch đại mức độ tổn thương.
246 trang |
Chia sẻ: Minh Bắc | Ngày: 16/01/2024 | Lượt xem: 90 | Lượt tải: 0
Bạn đang xem trước 20 trang tài liệu Luận án Tính dễ tổn thương và chiến lược thích ứng biến đổi khí hậu trong sinh kế của người dân tộc Khmer ở đồng bằng sông Cửu Long, để xem tài liệu hoàn chỉnh bạn click vào nút DOWNLOAD ở trên
----------------------------------------------------------------
Total 1921612.03 425 4521.44008
Bartlett's test for equal variances: chi2(2) = 174.7113 Prob>chi2 = 0.000
33
. pwmean TONGTHU, over(TINH) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : TINH
---------------------------
| Number of
| Comparisons
-------------+-------------
TINH | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
TONGTHU | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
TINH |
2 vs 1 | 37.60485 7.187491 5.23 0.000 20.69993 54.50977
3 vs 1 | -1.203445 8.241678 -0.15 0.988 -20.58781 18.18092
3 vs 2 | -38.80829 8.173896 -4.75 0.000 -58.03324 -19.58335
------------------------------------------------------------------------------
. oneway THUNN TINH
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 216666.423 2 108333.211 35.70 0.0000
Within groups 1283699.7 423 3034.75107
------------------------------------------------------------------------
Total 1500366.13 425 3530.27324
. pwmean THUNN, over(TINH) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : TINH
---------------------------
| Number of
| Comparisons
-------------+-------------
TINH | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
THUNN | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
TINH |
2 vs 1 | 50.62186 6.112947 8.28 0.000 36.24426 64.99946
3 vs 1 | 15.31983 7.009531 2.19 0.075 -1.16653 31.8062
3 vs 2 | -35.30203 6.951883 -5.08 0.000 -51.6528 -18.95125
------------------------------------------------------------------------------
. oneway THUPNN TINH
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 21501.8681 2 10750.934 6.02 0.0027
Within groups 755927.076 423 1787.06165
------------------------------------------------------------------------
Total 777428.944 425 1829.24457
Bartlett's test for equal variances: chi2(2) = 32.6525 Prob>chi2 = 0.000
. pwmean THUPNN, over(TINH) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : TINH
---------------------------
| Number of
| Comparisons
-------------+-------------
TINH | 3
---------------------------
34
------------------------------------------------------------------------------
| Tukey Tukey
THUPNN | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
TINH |
2 vs 1 | -13.01701 4.690929 -2.77 0.016 -24.05004 -1.983983
3 vs 1 | -16.67179 5.378946 -3.10 0.006 -29.32303 -4.020553
3 vs 2 | -3.654782 5.334708 -0.69 0.772 -16.20197 8.892411
------------------------------------------------------------------------------
. oneway TONGVAY TINH
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 8810.86564 2 4405.43282 0.81 0.4435
Within groups 2287791.74 423 5408.4911
------------------------------------------------------------------------
Total 2296602.6 425 5403.77083
Bartlett's test for equal variances: chi2(2) = 46.0483 Prob>chi2 = 0.000
. oneway DUNO TINH
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 3513.97369 2 1756.98684 0.45 0.6395
Within groups 1660492.2 423 3925.51347
------------------------------------------------------------------------
Total 1664006.17 425 3915.30864
Bartlett's test for equal variances: chi2(2) = 39.7573 Prob>chi2 = 0.000
. oneway LVIce TINH
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 1.38926064 2 .694630318 18.20 0.0000
Within groups 16.1458795 423 .038169928
------------------------------------------------------------------------
Total 17.5351402 425 .041259153
Bartlett's test for equal variances: chi2(2) = 29.9909 Prob>chi2 = 0.000
. pwmean LVIce, over(TINH) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : TINH
---------------------------
| Number of
| Comparisons
-------------+-------------
TINH | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
LVIce | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
TINH |
2 vs 1 | -.1299775 .0216795 -6.00 0.000 -.1809676 -.0789874
3 vs 1 | -.0514271 .0248593 -2.07 0.098 -.1098959 .0070417
3 vs 2 | .0785504 .0246548 3.19 0.004 .0205625 .1365383
------------------------------------------------------------------------------
. oneway LVIIPCCc TINH
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 6.41221662 2 3.20610831 16.58 0.0000
Within groups 81.7799076 423 .193333115
------------------------------------------------------------------------
Total 88.1921242 425 .20751088
35
. pwmean LVIIPCCc, over(TINH) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : TINH
---------------------------
| Number of
| Comparisons
-------------+-------------
TINH | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
LVIIPCCc | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
TINH |
2 vs 1 | .2809915 .0487913 5.76 0.000 .1662348 .3957482
3 vs 1 | .1434966 .0559475 2.56 0.029 .0119086 .2750847
3 vs 2 | -.1374949 .0554874 -2.48 0.036 -.2680007 -.006989
------------------------------------------------------------------------------
. oneway LD CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 6.56301397 2 3.28150698 1.77 0.1722
Within groups 785.683465 423 1.85740772
------------------------------------------------------------------------
Total 792.246479 425 1.86410936
Bartlett's test for equal variances: chi2(2) = 5.3740 Prob>chi2 = 0.068
. oneway TYLE CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 3.95254492 2 1.97627246 4.20 0.0156
Within groups 198.996553 423 .470441023
------------------------------------------------------------------------
Total 202.949098 425 .477527289
Bartlett's test for equal variances: chi2(2) = 38.0460 Prob>chi2 = 0.000
. pwmean TYLE, over(CLAP) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : CLAP
---------------------------
| Number of
| Comparisons
-------------+-------------
CLAP | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
TYLE | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
CLAP |
2 vs 1 | .1043945 .1247596 0.84 0.680 -.1890392 .3978281
3 vs 1 | -.1639903 .0763752 -2.15 0.082 -.3436241 .0156435
3 vs 2 | -.2683848 .1149632 -2.33 0.052 -.5387775 .0020078
------------------------------------------------------------------------------
. oneway dientich CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 11879.7086 2 5939.85432 53.15 0.0000
Within groups 47277.3505 423 111.766786
------------------------------------------------------------------------
Total 59157.0592 425 139.19308
Bartlett's test for equal variances: chi2(2) = 110.4946 Prob>chi2 = 0.000
36
. pwmean dientich, over(CLAP) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : CLAP
---------------------------
| Number of
| Comparisons
-------------+-------------
CLAP | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
dientich | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
CLAP |
2 vs 1 | 4.884115 1.922994 2.54 0.031 .3612485 9.406981
3 vs 1 | 11.90715 1.177215 10.11 0.000 9.138348 14.67595
3 vs 2 | 7.023035 1.771996 3.96 0.000 2.855314 11.19076
------------------------------------------------------------------------------
. oneway THUNN CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 204349.123 2 102174.561 33.35 0.0000
Within groups 1296017 423 3063.86998
------------------------------------------------------------------------
Total 1500366.13 425 3530.27324
Bartlett's test for equal variances: chi2(2) = 206.0096 Prob>chi2 = 0.000
. pwmean THUNN, over(CLAP) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : CLAP
---------------------------
| Number of
| Comparisons
-------------+-------------
CLAP | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
THUNN | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
CLAP |
2 vs 1 | 10.6278 10.06831 1.06 0.542 -13.05278 34.30839
3 vs 1 | 47.8737 6.163604 7.77 0.000 33.37695 62.37045
3 vs 2 | 37.2459 9.277726 4.01 0.000 15.42476 59.06704
------------------------------------------------------------------------------
. oneway THUPNN CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 30615.5025 2 15307.7513 8.67 0.0002
Within groups 746813.442 423 1765.51641
------------------------------------------------------------------------
Total 777428.944 425 1829.24457
Bartlett's test for equal variances: chi2(2) = 8.0130 Prob>chi2 = 0.018
. pwmean THUPNN, over(CLAP) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : CLAP
---------------------------
| Number of
| Comparisons
-------------+-------------
CLAP | 3
---------------------------
37
------------------------------------------------------------------------------
| Tukey Tukey
THUPNN | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
CLAP |
2 vs 1 | -8.961688 7.642885 -1.17 0.470 -26.93769 9.014319
3 vs 1 | -19.24003 4.67881 -4.11 0.000 -30.24456 -8.235505
3 vs 2 | -10.27834 7.04275 -1.46 0.312 -26.84284 6.286151
------------------------------------------------------------------------------
. oneway HVAN CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 398.119337 2 199.059668 13.85 0.0000
Within groups 6078.37832 423 14.3696887
------------------------------------------------------------------------
Total 6476.49765 425 15.238818
Bartlett's test for equal variances: chi2(2) = 0.3278 Prob>chi2 = 0.849
. pwmean HVAN, over(CLAP) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : CLAP
---------------------------
| Number of
| Comparisons
-------------+-------------
CLAP | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
HVAN | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
CLAP |
2 vs 1 | .8125133 .6895172 1.18 0.467 -.809226 2.434252
3 vs 1 | 2.169243 .4221077 5.14 0.000 1.176449 3.162037
3 vs 2 | 1.35673 .6353749 2.14 0.084 -.137667 2.851127
------------------------------------------------------------------------------
. oneway M9 CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups .101293549 2 .050646775 3.40 0.0343
Within groups 6.30269734 423 .014899994
------------------------------------------------------------------------
Total 6.40399089 425 .015068214
Bartlett's test for equal variances: chi2(2) = 30.3469 Prob>chi2 = 0.000
. pwmean M9, over(CLAP) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : CLAP
---------------------------
| Number of
| Comparisons
-------------+-------------
CLAP | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
M9 | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
CLAP |
2 vs 1 | .0370755 .0222031 1.67 0.218 -.0151461 .0892972
3 vs 1 | .0343264 .0135923 2.53 0.032 .0023574 .0662953
3 vs 2 | -.0027492 .0204597 -0.13 0.990 -.0508702 .0453719
------------------------------------------------------------------------------
38
. oneway M10 CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups .041629189 2 .020814594 0.26 0.7731
Within groups 34.1978074 423 .08084588
------------------------------------------------------------------------
Total 34.2394366 425 .08056338
Bartlett's test for equal variances: chi2(2) = 0.0365 Prob>chi2 = 0.982
. pwmean M10, over(CLAP) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : CLAP
---------------------------
| Number of
| Comparisons
-------------+-------------
CLAP | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
M10 | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
CLAP |
2 vs 1 | .0312831 .051719 0.60 0.818 -.0903596 .1529259
3 vs 1 | -.002818 .0316613 -0.09 0.996 -.0772851 .0716491
3 vs 2 | -.0341012 .0476579 -0.72 0.754 -.1461923 .0779899
------------------------------------------------------------------------------
. oneway TCXH CLAP
Analysis of Variance
Source SS df MS F Prob > F
------------------------------------------------------------------------
Between groups 9.85923785 2 4.92961893 8.50 0.0002
Within groups 245.194753 423 .579656626
------------------------------------------------------------------------
Total 255.053991 425 .600127037
Bartlett's test for equal variances: chi2(2) = 5.8107 Prob>chi2 = 0.055
. pwmean TCXH, over(CLAP) mcompare(tukey) effects
Pairwise comparisons of means with equal variances
over : CLAP
---------------------------
| Number of
| Comparisons
-------------+-------------
CLAP | 3
---------------------------
------------------------------------------------------------------------------
| Tukey Tukey
TCXH | Contrast Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
CLAP |
2 vs 1 | .3650053 .1384863 2.64 0.024 .0392866 .690724
3 vs 1 | .3388084 .0847784 4.00 0.000 .1394103 .5382064
3 vs 2 | -.0261969 .1276121 -0.21 0.977 -.3263396 .2739457
39
3.2 Kiểm định Chi-square
40
41
42
43
. tab CLAP GIOI, col chi2
+-------------------+
| Key |
|-------------------|
| frequency |
| column percentage |
+-------------------+
| GIOI
CLAP | 0 1 | Total
-----------+----------------------+----------
1 | 70 45 | 115
| 21.54 44.55 | 27.00
-----------+----------------------+----------
2 | 33 8 | 41
| 10.15 7.92 | 9.62
-----------+----------------------+----------
3 | 222 48 | 270
| 68.31 47.52 | 63.38
-----------+----------------------+----------
Total | 325 101 | 426
| 100.00 100.00 | 100.00
Pearson chi2(2) = 20.7709 Pr = 0.000
. tab CLAP NHA, col chi2
+-------------------+
| Key |
|-------------------|
| frequency |
| column percentage |
+-------------------+
| NHA
CLAP | 0 1 | Total
-----------+----------------------+----------
1 | 68 47 | 115
| 30.91 22.82 | 27.00
-----------+----------------------+----------
2 | 29 12 | 41
| 13.18 5.83 | 9.62
-----------+----------------------+----------
3 | 123 147 | 270
| 55.91 71.36 | 63.38
-----------+----------------------+----------
Total | 220 206 | 426
| 100.00 100.00 | 100.00
Pearson chi2(2) = 12.5704 Pr = 0.002
3.3 Kiểm định T-test
. sdtest LVIce, by (GIOI)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 325 .3615722 .01093 .1970439 .3400694 .3830749
1 | 101 .4893136 .0191349 .1923035 .4513504 .5272767
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 1.0499
Ho: ratio = 1 degrees of freedom = 324, 100
Ha: ratio 1
Pr(F f) = 0.7865 Pr(F > f) = 0.3933
44
. ttest LVIce, by (GIOI)
Two-sample t test with equal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 325 .3615722 .01093 .1970439 .3400694 .3830749
1 | 101 .4893136 .0191349 .1923035 .4513504 .5272767
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | -.1277414 .0223212 -.1716153 -.0838674
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = -5.7229
Ho: diff = 0 degrees of freedom = 424
Ha: diff 0
Pr(T |t|) = 0.0000 Pr(T > t) = 1.0000
. sdtest LVIce, by (NHA)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 220 .4437625 .0118905 .1763644 .4203281 .4671969
1 | 206 .3364266 .0149967 .2152436 .3068589 .3659942
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 0.6714
Ho: ratio = 1 degrees of freedom = 219, 205
Ha: ratio 1
Pr(F f) = 0.9981
. ttest LVIce, by (NHA) unequal
Two-sample t test with unequal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 220 .4437625 .0118905 .1763644 .4203281 .4671969
1 | 206 .3364266 .0149967 .2152436 .3068589 .3659942
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | .1073359 .0191386 .0697103 .1449616
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = 5.6084
Ho: diff = 0 Satterthwaite's degrees of freedom = 396.925
Ha: diff 0
Pr(T |t|) = 0.0000 Pr(T > t) = 0.0000
. sdtest LVIce, by (HONGHEO)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 372 .3771347 .0104432 .2014217 .3565993 .39767
1 | 54 .4932876 .0254054 .1866904 .4423309 .5442443
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 1.1640
Ho: ratio = 1 degrees of freedom = 371, 53
Ha: ratio 1
Pr(F f) = 0.5065 Pr(F > f) = 0.2532
45
. ttest LVIce, by (HONGHEO)
Two-sample t test with equal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 372 .3771347 .0104432 .2014217 .3565993 .39767
1 | 54 .4932876 .0254054 .1866904 .4423309 .5442443
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | -.1161529 .0290726 -.1732972 -.0590086
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = -3.9953
Ho: diff = 0 degrees of freedom = 424
Ha: diff 0
Pr(T |t|) = 0.0001 Pr(T > t) = 1.0000
. sdtest LVIce, by (TINDUNG)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 162 .3483102 .0165217 .2102869 .315683 .3809374
1 | 264 .418581 .0119529 .1942117 .3950454 .4421165
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 1.1724
Ho: ratio = 1 degrees of freedom = 161, 263
Ha: ratio 1
Pr(F f) = 0.2541 Pr(F > f) = 0.1270
. ttest LVIce, by (TINDUNG)
Two-sample t test with equal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 162 .3483102 .0165217 .2102869 .315683 .3809374
1 | 264 .418581 .0119529 .1942117 .3950454 .4421165
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | -.0702708 .0200073 -.1095967 -.0309448
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = -3.5122
Ho: diff = 0 degrees of freedom = 424
Ha: diff 0
Pr(T |t|) = 0.0005 Pr(T > t) = 0.9998
. sdtest LVIce, by (TCTT)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 156 .4785005 .0128633 .1606626 .4530905 .5039105
1 | 270 .3417983 .0126848 .2084329 .3168241 .3667725
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 0.5942
Ho: ratio = 1 degrees of freedom = 155, 269
Ha: ratio 1
Pr(F f) = 0.9998
46
. ttest LVIce, by (TCTT) unequal
Two-sample t test with unequal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 156 .4785005 .0128633 .1606626 .4530905 .5039105
1 | 270 .3417983 .0126848 .2084329 .3168241 .3667725
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | .1367022 .0180657 .101184 .1722204
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = 7.5669
Ho: diff = 0 Satterthwaite's degrees of freedom = 390.34
Ha: diff 0
Pr(T |t|) = 0.0000 Pr(T > t) = 0.0000
. sdtest LVIce, by (tcxh)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 163 .4727385 .0140034 .1787834 .4450858 .5003913
1 | 263 .3417309 .0124204 .2014254 .3172744 .3661875
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 0.7878
Ho: ratio = 1 degrees of freedom = 162, 262
Ha: ratio 1
Pr(F f) = 0.9512
. ttest LVIce, by (tcxh)
Two-sample t test with equal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 163 .4727385 .0140034 .1787834 .4450858 .5003913
1 | 263 .3417309 .0124204 .2014254 .3172744 .3661875
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | .1310076 .0192481 .093174 .1688413
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = 6.8062
Ho: diff = 0 degrees of freedom = 424
Ha: diff 0
Pr(T |t|) = 0.0000 Pr(T > t) = 0.0000
. sdtest LVIce, by (chudong)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 156 .5207166 .0128377 .1603429 .4953572 .5460761
1 | 270 .3174068 .0114146 .1875611 .2949335 .3398801
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 0.7308
Ho: ratio = 1 degrees of freedom = 155, 269
Ha: ratio 1
Pr(F f) = 0.9842
47
. ttest LVIce, by (chudong) unequal
Two-sample t test with unequal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 156 .5207166 .0128377 .1603429 .4953572 .5460761
1 | 270 .3174068 .0114146 .1875611 .2949335 .3398801
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | .2033098 .0171785 .1695287 .2370909
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = 11.8351
Ho: diff = 0 Satterthwaite's degrees of freedom = 365.373
Ha: diff 0
Pr(T |t|) = 0.0000 Pr(T > t) = 0.0000
. sdtest LVIce, by (ungpho)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 385 .3859425 .0106559 .2090845 .3649912 .4068938
1 | 41 .4474086 .0192556 .1232961 .4084916 .4863257
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 2.8757
Ho: ratio = 1 degrees of freedom = 384, 40
Ha: ratio 1
Pr(F f) = 0.0001 Pr(F > f) = 0.0001
. ttest LVIce, by (ungpho) unequal
Two-sample t test with unequal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 385 .3859425 .0106559 .2090845 .3649912 .4068938
1 | 41 .4474086 .0192556 .1232961 .4084916 .4863257
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | -.0614661 .0220074 -.1053861 -.0175461
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = -2.7930
Ho: diff = 0 Satterthwaite's degrees of freedom = 67.5907
Ha: diff 0
Pr(T |t|) = 0.0068 Pr(T > t) = 0.9966
. sdtest LVIce, by (HTDP)
Variance ratio test
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 247 .4124188 .0121656 .1911967 .3884568 .4363807
1 | 179 .363487 .016134 .2158576 .3316486 .3953255
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
------------------------------------------------------------------------------
ratio = sd(0) / sd(1) f = 0.7846
Ho: ratio = 1 degrees of freedom = 246, 178
Ha: ratio 1
Pr(F f) = 0.9606
48
. ttest LVIce, by (HTDP) unequal
Two-sample t test with unequal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 247 .4124188 .0121656 .1911967 .3884568 .4363807
1 | 179 .363487 .016134 .2158576 .3316486 .3953255
---------+--------------------------------------------------------------------
combined | 426 .3918583 .0098414 .2031235 .3725145 .4112021
---------+--------------------------------------------------------------------
diff | .0489317 .0202066 .0091921 .0886714
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = 2.4216
Ho: diff = 0 Satterthwaite's degrees of freedom = 354.93
Ha: diff 0
Pr(T |t|) = 0.0160 Pr(T > t) = 0.0080
49
PHỤ LỤC 4. PHÂN TÍCH THÀNH PHẦN CHÍNH PCA
4.1 Kết quả PCA cho các thành phần phụ
. pca S11 S12 S13 S14 S15, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .6501644
Rotation: (unrotated = principal) Rho = 0.5024
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .326637 .168826 0.5024 0.5024
Comp2 | .157811 .0466974 0.2427 0.7451
Comp3 | .111114 .0748182 0.1709 0.9160
Comp4 | .0362955 .0179881 0.0558 0.9718
Comp5 | .0183074 . 0.0282 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S11 | 0.0201 | .01897
S12 | 0.3896 | .1317
S13 | 0.1125 | .0355
S14 | 0.5150 | .08176
S15 | 0.7550 | .05558
--------------------------------------
. pca S21 S22 S23 S24 S25, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .9896879
Rotation: (unrotated = principal) Rho = 0.3902
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .386145 .189229 0.3902 0.3902
Comp2 | .196916 .00727724 0.1990 0.5891
Comp3 | .189639 .0452739 0.1916 0.7808
Comp4 | .144365 .071742 0.1459 0.9266
Comp5 | .072623 . 0.0734 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S21 | 0.2176 | .1782
S22 | -0.6377 | .06878
S23 | 0.3600 | .07148
S24 | 0.0794 | .1951
S25 | 0.6404 | .09001
--------------------------------------
. pca S31 S32 S33 S34, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .5502126
Rotation: (unrotated = principal) Rho = 0.3710
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .204113 .0498732 0.3710 0.3710
50
Comp2 | .15424 .043819 0.2803 0.6513
Comp3 | .110421 .0289826 0.2007 0.8520
Comp4 | .0814384 . 0.1480 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S31 | 0.8617 | .03812
S32 | 0.2709 | .1258
S33 | 0.1394 | .08131
S34 | 0.4057 | .1009
--------------------------------------
. pca S41 S42 S43 S44 S45 S46, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .8138914
Rotation: (unrotated = principal) Rho = 0.3543
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .288323 .0393781 0.3543 0.3543
Comp2 | .248945 .104563 0.3059 0.6601
Comp3 | .144381 .0547727 0.1774 0.8375
Comp4 | .0896085 .0628613 0.1101 0.9476
Comp5 | .0267473 .0108602 0.0329 0.9805
Comp6 | .0158871 . 0.0195 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S41 | 0.0068 | .01605
S42 | 0.3359 | .2001
S43 | 0.7229 | .09495
S44 | 0.5930 | .08831
S45 | 0.0726 | .02814
S46 | 0.0877 | .098
--------------------------------------
. pca S51 S52, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .35657
Rotation: (unrotated = principal) Rho = 0.6890
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .245676 .134782 0.6890 0.6890
Comp2 | .110894 . 0.3110 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S51 | 0.0209 | .1108
S52 | 0.9998 | .00004846
--------------------------------------
. pca S61 S62, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .3120377
51
Rotation: (unrotated = principal) Rho = 0.7105
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .221712 .131387 0.7105 0.7105
Comp2 | .0903255 . 0.2895 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S61 | 0.1292 | .08882
S62 | 0.9916 | .001508
--------------------------------------
. pca S71 S72 S73, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .2078756
Rotation: (unrotated = principal) Rho = 0.5858
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .121783 .0425344 0.5858 0.5858
Comp2 | .0792487 .072405 0.3812 0.9671
Comp3 | .00684375 . 0.0329 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S71 | 0.1320 | .007152
S72 | 0.7039 | .03987
S73 | 0.6979 | .03907
--------------------------------------
. pca S81 S82 S83 S84, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .7177683
Rotation: (unrotated = principal) Rho = 0.5844
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .419491 .249942 0.5844 0.5844
Comp2 | .169549 .0615491 0.2362 0.8207
Comp3 | .108 .0872725 0.1505 0.9711
Comp4 | .0207278 . 0.0289 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S81 | 0.0687 | .1293
S82 | 0.7003 | .01126
S83 | 0.7095 | .01079
S84 | -0.0385 | .147
--------------------------------------
. pca S91 S92 S93 S94 S95 S96, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .4295052
Rotation: (unrotated = principal) Rho = 0.5816
--------------------------------------------------------------------------
52
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .249783 .138562 0.5816 0.5816
Comp2 | .11122 .0784568 0.2590 0.8405
Comp3 | .0327637 .0046476 0.0763 0.9168
Comp4 | .0281161 .0240125 0.0655 0.9823
Comp5 | .00410358 .00058496 0.0096 0.9918
Comp6 | .00351862 . 0.0082 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S91 | -0.0370 | .03139
S92 | 0.9910 | .0006493
S93 | 0.1047 | .0454
S94 | 0.0099 | .003541
S95 | -0.0741 | .09452
S96 | -0.0075 | .004225
--------------------------------------
. pca S101 S102 S103 S104, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .6548799
Rotation: (unrotated = principal) Rho = 0.4959
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .324769 .177089 0.4959 0.4959
Comp2 | .14768 .0259314 0.2255 0.7214
Comp3 | .121748 .0610654 0.1859 0.9073
Comp4 | .0606829 . 0.0927 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
S101 | 0.5527 | .09726
S102 | 0.4415 | .09538
S103 | 0.4518 | .0791
S104 | 0.5436 | .05838
--------------------------------------
4.2 Tính pca của 03 nhân tố chính của lvi-ipcc (khả năng thích ứng, độ nhạy
cảm và mức độ phơi nhiễm)
. pca M1c M2c M3c M4c, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = 1.150437
Rotation: (unrotated = principal) Rho = 0.8038
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .92475 .833688 0.8038 0.8038
Comp2 | .0910618 .0100418 0.0792 0.8830
Comp3 | .08102 .0274142 0.0704 0.9534
Comp4 | .0536057 . 0.0466 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
53
Variable | Comp1 | Unexplained
-------------+----------+-------------
M1c | 0.1443 | .08241
M2c | 0.9786 | .003585
M3c | 0.1345 | .0558
M4c | 0.0587 | .08389
--------------------------------------
. pca M5c M6c M7c M8c, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .6664765
Rotation: (unrotated = principal) Rho = 0.3643
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .242828 .041687 0.3643 0.3643
Comp2 | .201141 .0248192 0.3018 0.6661
Comp3 | .176322 .130136 0.2646 0.9307
Comp4 | .0461855 . 0.0693 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
M5c | 0.9175 | .03137
M6c | 0.0322 | .1763
M7c | 0.1123 | .0487
M8c | 0.3802 | .1673
--------------------------------------
. pca M9c M10c, components(1) covariance
Principal components/covariance Number of obs = 426
Number of comp. = 1
Trace = .3384791
Rotation: (unrotated = principal) Rho = 0.7584
--------------------------------------------------------------------------
Component | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Comp1 | .256705 .174932 0.7584 0.7584
Comp2 | .0817737 . 0.2416 1.0000
--------------------------------------------------------------------------
Principal components (eigenvectors)
--------------------------------------
Variable | Comp1 | Unexplained
-------------+----------+-------------
M9c | 0.9992 | .0001262
M10c | 0.0393 | .08165
--------------------------------------
54
PHỤ LỤC 5. MÔ HÌNH HỒI QUY
5.1 Mô hình hồi quy
. reg LVIce GIOI HVAN LD TYLE HONGHEO dientich NHA THUNN THUPNN TINDUNG TCTT TCXH
HTDP M9 M10 chudong ungpho
Source | SS df MS Number of obs = 426
-------------+---------------------------------- F(17, 408) = 73.88
Model | 13.2355721 17 .778563064 Prob > F = 0.0000
Residual | 4.29956807 408 .010538157 R-squared = 0.7548
-------------+---------------------------------- Adj R-squared = 0.7446
Total | 17.5351402 425 .041259153 Root MSE = .10266
------------------------------------------------------------------------------
LVIce | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
GIOI | .0703706 .0124974 5.63 0.000 .0458033 .0949379
HVAN | -.0077211 .0014858 -5.20 0.000 -.0106419 -.0048003
LD | .0176419 .0046878 3.76 0.000 .0084266 .0268571
TYLE | .0160932 .008962 1.80 0.073 -.0015244 .0337107
HONGHEO | .0264328 .0156868 1.69 0.093 -.0044043 .0572699
dientich | -.0024424 .0006863 -3.56 0.000 -.0037914 -.0010933
NHA | -.0252397 .0108298 -2.33 0.020 -.0465289 -.0039505
THUNN | -.0005662 .0001398 -4.05 0.000 -.000841 -.0002915
THUPNN | .0007598 .0001285 5.91 0.000 .0005073 .0010123
TINDUNG | .0393671 .0106663 3.69 0.000 .0183994 .0603348
TCTT | -.0693518 .0109771 -6.32 0.000 -.0909306 -.047773
TCXH | -.037559 .0072589 -5.17 0.000 -.0518286 -.0232894
HTDP | -.0191055 .0110014 -1.74 0.083 -.040732 .002521
M9 | .537839 .0427332 12.59 0.000 .4538344 .6218436
M10 | .1071765 .0184901 5.80 0.000 .0708286 .1435243
chudong | -.1228537 .0136247 -9.02 0.000 -.149637 -.0960704
ungpho | -.0684946 .0196661 -3.48 0.001 -.1071541 -.029835
_cons | .4896093 .0299541 16.35 0.000 .4307256 .5484929
------------------------------------------------------------------------------
. reg LVIce GIOI HVAN LD TYLE HONGHEO dientich NHA THUNN THUPNN TINDUNG TCTT TCXH
HTDP M9 M10 chudong ungpho, beta
Source | SS df MS Number of obs = 426
-------------+---------------------------------- F(17, 408) = 73.88
Model | 13.2355721 17 .778563064 Prob > F = 0.0000
Residual | 4.29956807 408 .010538157 R-squared = 0.7548
-------------+---------------------------------- Adj R-squared = 0.7446
Total | 17.5351402 425 .041259153 Root MSE = .10266
------------------------------------------------------------------------------
LVIce | Coef. Std. Err. t P>|t| Beta
-------------+----------------------------------------------------------------
GIOI | .0703706 .0124974 5.63 0.000 .1475143
HVAN | -.0077211 .0014858 -5.20 0.000 -.1483867
LD | .0176419 .0046878 3.76 0.000 .1185824
TYLE | .0160932 .008962 1.80 0.073 .0547496
HONGHEO | .0264328 .0156868 1.69 0.093 .0433463
dientich | -.0024424 .0006863 -3.56 0.000 -.1418601
NHA | -.0252397 .0108298 -2.33 0.020 -.0621684
THUNN | -.0005662 .0001398 -4.05 0.000 -.1656304
THUPNN | .0007598 .0001285 5.91 0.000 .1599836
TINDUNG | .0393671 .0106663 3.69 0.000 .0941962
TCTT | -.0693518 .0109771 -6.32 0.000 -.1646806
TCXH | -.037559 .0072589 -5.17 0.000 -.1432437
HTDP | -.0191055 .0110014 -1.74 0.083 -.0464809
M9 | .537839 .0427332 12.59 0.000 .3250297
M10 | .1071765 .0184901 5.80 0.000 .1497642
chudong | -.1228537 .0136247 -9.02 0.000 -.2917246
ungpho | -.0684946 .0196661 -3.48 0.001 -.0995678
_cons | .4896093 .0299541 16.35 0.000 .
------------------------------------------------------------------------------
55
5.3 Kiểm định sự phù hợp của mô hình
. sktest LVIce
Skewness/Kurtosis tests for Normality
------ joint ------
Variable | Obs Pr(Skewness) Pr(Kurtosis) adj chi2(2) Prob>chi2
-------------+---------------------------------------------------------------
LVIce | 426 0.1541 0.0214 7.10 0.0288
. predict residual, resid
. sktest residual
Skewness/Kurtosis tests for Normality
------ joint ------
Variable | Obs Pr(Skewness) Pr(Kurtosis) adj chi2(2) Prob>chi2
-------------+---------------------------------------------------------------
residual | 426 0.5575 0.9348 0.35 0.8378
. vif
Variable | VIF 1/VIF
-------------+----------------------
THUNN | 2.78 0.359590
dientich | 2.64 0.378237
chudong | 1.74 0.574162
LD | 1.65 0.605298
TYLE | 1.55 0.646494
ungpho | 1.36 0.735349
HVAN | 1.36 0.737069
TCXH | 1.28 0.784125
THUPNN | 1.22 0.821428
HTDP | 1.19 0.838935
NHA | 1.18 0.844580
GIOI | 1.14 0.875651
TCTT | 1.13 0.884519
M10 | 1.11 0.900240
M9 | 1.11 0.901123
HONGHEO | 1.10 0.908169
TINDUNG | 1.08 0.922635
-------------+----------------------
Mean VIF | 1.45
. estat hettest
Breusch-Pagan / Cook-Weisberg test for heteroskedasticity
Ho: Constant variance
Variables: fitted values of LVIce
chi2(1) = 0.45
Prob > chi2 = 0.5034