IV (2SLS) estimation
--------------------
Estimates efficient for homoskedasticity only
Statistics robust to heteroskedasticity
Number of obs = 1124
F( 20, 1103) = 764.43
Prob > F = 0.0000
Total (centered) SS = 159.1498694 Centered R2 = 0.9303
Total (uncentered) SS = 83346.46359 Uncentered R2 = 0.9999
Residual SS = 11.09928239 Root MSE = .09937
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| Robust
RNI | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
ARGG | .0412136 .0078593 5.24 0.000 .0258097 .0566174
cons | -.0737177 .013252 -5.56 0.000 -.0996911 -.0477443
FEF | -.1485794 .0141135 -10.53 0.000 -.1762413 -.1209176
FL | .0797606 .0085264 9.35 0.000 .0630492 .0964719
EXP | .0261413 .003181 8.22 0.000 .0199066 .0323759
EDU | .0816415 .0229133 3.56 0.000 .0367323 .1265507
GRAIN | -.0074574 .0048842 -1.53 0.127 -.0170302 .0021154
INVEST | .0488811 .0060842 8.03 0.000 .0369563 .0608058
tempavg | .0013678 .0006174 2.22 0.027 .0001578 .0025778
prectot | -.0001453 .0001309 -1.11 0.267 -.0004019 .0001113
suntot | 7.55e-06 .0000107 0.70 0.482 -.0000135 .0000286
pennesula | .12207 .009312 13.11 0.000 .1038189 .1403212
DENS | .0374676 .0078564 4.77 0.000 .0220694 .0528657
ROOM | .0291146 .008812 3.30 0.001 .0118434 .0463859
OIL1 | -.0012284 .0016196 -0.76 0.448 -.0044028 .0019459
FRUIT1 | .0182439 .0039492 4.62 0.000 .0105036 .0259842
FOOD1 | .0013416 .0028592 0.47 0.639 -.0042623 .0069456
MILK1 | -.0176544 .0070276 -2.51 0.012 -.0314283 -.0038806
VEGETABLE1 | .0145495 .0022232 6.54 0.000 .0101921 .018907
T | .0849713 .0024892 34.14 0.000 .0800926 .0898501
_cons | 6.283239 .1194377 52.61 0.000 6.049146 6.517333
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Underidentification test (Kleibergen-Paap rk LM statistic): 79.707
Chi-sq(2) P-val = 0.0000
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Weak identification test (Cragg-Donald Wald F statistic): 121.313
(Kleibergen-Paap rk Wald F statistic): 36.094
Stock-Yogo weak ID test critical values: 10% maximal IV size 19.93
15% maximal IV size 11.59
20% maximal IV size 8.75
25% maximal IV size 7.25
Source: Stock-Yogo (2005). Reproduced by permission.
NB: Critical values are for Cragg-Donald F statistic and i.i.d. errors.
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Hansen J statistic (overidentification test of all instruments): 0.654
Chi-sq(1) P-val = 0.4188
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Instrumented: ARGG
Included instruments: cons FEF FL EXP EDU GRAIN INVEST tempavg prectot suntot
pennesula DENS ROOM OIL1 FRUIT1 FOOD1 MILK1 VEGETABLE1 T
Excluded instruments: NBLL NBAA
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FIXED EFFECTS ESTIMATION
------------------------
Number of groups = 130 Obs per group: min = 3
avg = 8.6
max = 9
IV (2SLS) estimation
--------------------
Estimates efficient for homoskedasticity only
Statistics robust to heteroskedasticity
Number of obs = 1123
F( 19, 974) = 3849.44
Prob > F = 0.0000
Total (centered) SS = 113.0197445 Centered R2 = 0.9893
Total (uncentered) SS = 113.0197445 Uncentered R2 = 0.9893
Residual SS = 1.204024912 Root MSE = .03482
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| Robust
RNI | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
ARGG | .0027166 .0029788 0.91 0.362 -.0031217 .0085549
cons | -.0054921 .0050187 -1.09 0.274 -.0153285 .0043443
FEF | -.001802 .0129296 -0.14 0.889 -.0271436 .0235396
FL | -.004058 .006659 -0.61 0.542 -.0171093 .0089934
EXP | .009008 .0023321 3.86 0.000 .0044372 .0135788
EDU | .0209139 .0097534 2.14 0.032 .0017976 .0400301
GRAIN | -.0184829 .0067431 -2.74 0.006 -.0316991 -.0052667
INVEST | -.0011944 .0027941 -0.43 0.669 -.0066708 .004282
tempavg | -.0000532 .0002258 -0.24 0.814 -.0004957 .0003893
prectot | -.0000287 .0000405 -0.71 0.479 -.0001082 .0000507
suntot | 7.53e-06 5.73e-06 1.31 0.189 -3.70e-06 .0000188
DENS | .0107967 .0089647 1.20 0.228 -.0067738 .0283673
ROOM | .0117018 .004691 2.49 0.013 .0025076 .020896
OIL1 | -.0003407 .0023629 -0.14 0.885 -.004972 .0042906
FRUIT1 | .0093799 .0038716 2.42 0.015 .0017917 .0169681
FOOD1 | -.0007638 .0030007 -0.25 0.799 -.006645 .0051175
MILK1 | .0112484 .0056664 1.99 0.047 .0001426 .0223543
VEGETABLE1 | .0047301 .0027273 1.73 0.083 -.0006154 .0100755
T | .1241214 .0016225 76.50 0.000 .1209413 .1273015
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Underidentification test (Kleibergen-Paap rk LM statistic): 90.975
Chi-sq(2) P-val = 0.0000
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Weak identification test (Cragg-Donald Wald F statistic): 100.751
(Kleibergen-Paap rk Wald F statistic): 39.919
Stock-Yogo weak ID test critical values: 10% maximal IV size 19.93
15% maximal IV size 11.59
20% maximal IV size 8.75
25% maximal IV size 7.25
Source: Stock-Yogo (2005). Reproduced by permission.
NB: Critical values are for Cragg-Donald F statistic and i.i.d. errors.
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Hansen J statistic (overidentification test of all instruments): 22.493
Chi-sq(1) P-val = 0.0000
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Instrumented: ARGG
Included instruments: cons FEF FL EXP EDU GRAIN INVEST tempavg prectot suntot
DENS ROOM OIL1 FRUIT1 FOOD1 MILK1 VEGETABLE1 T
Excluded instruments: NBLL NBAA
Dropped collinear: pennesula
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