-------------------------------------------------------------------------------- log: C:\Documents and Settings\Patricia_Anderson\My Documents\ECON 20\In > Class\oct28.log log type: text opened on: 28 Oct 2002, 11:11:12 . use wage2 . reg lwage educ exper Source | SS df MS Number of obs = 935 -------------+------------------------------ F( 2, 932) = 70.16 Model | 21.6776647 2 10.8388324 Prob > F = 0.0000 Residual | 143.97863 932 .154483508 R-squared = 0.1309 -------------+------------------------------ Adj R-squared = 0.1290 Total | 165.656294 934 .177362199 Root MSE = .39304 ------------------------------------------------------------------------------ lwage | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- educ | .077782 .0065769 11.83 0.000 .0648748 .0906892 exper | .0197768 .0033025 5.99 0.000 .0132956 .026258 _cons | 5.502709 .112037 49.12 0.000 5.282835 5.722584 ------------------------------------------------------------------------------ . **this suffered from omitted variable bias - think it's positively biased . **add proxy for ability . reg lwage educ exper IQ Source | SS df MS Number of obs = 935 -------------+------------------------------ F( 3, 931) = 60.10 Model | 26.876773 3 8.95892434 Prob > F = 0.0000 Residual | 138.779521 931 .149065007 R-squared = 0.1622 -------------+------------------------------ Adj R-squared = 0.1595 Total | 165.656294 934 .177362199 Root MSE = .38609 ------------------------------------------------------------------------------ lwage | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- educ | .057108 .007348 7.77 0.000 .0426876 .0715285 exper | .0195249 .0032444 6.02 0.000 .0131579 .025892 IQ | .0057856 .0009797 5.91 0.000 .003863 .0077082 _cons | 5.198085 .1215426 42.77 0.000 4.959556 5.436614 ------------------------------------------------------------------------------ . use crime2 . reg lcrmrte lawexpc pcinc Source | SS df MS Number of obs = 92 -------------+------------------------------ F( 2, 89) = 2.61 Model | .405906064 2 .202953032 Prob > F = 0.0792 Residual | 6.92266735 89 .077782779 R-squared = 0.0554 -------------+------------------------------ Adj R-squared = 0.0342 Total | 7.32857341 91 .080533774 Root MSE = .2789 ------------------------------------------------------------------------------ lcrmrte | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- lawexpc | .0002259 .0001001 2.26 0.026 .000027 .0004249 pcinc | -.0000164 .0000141 -1.16 0.250 -.0000445 .0000117 _cons | 4.501887 .1306522 34.46 0.000 4.242284 4.76149 ------------------------------------------------------------------------------ . **use a lagged dep var as a proxy for stuff I left out . reg lcrmrte lawexpc pcinc lcrmrte_1 variable lcrmrte_1 not found r(111); . reg lcrmrte lawexpc pcinc lcrmrt_1 Source | SS df MS Number of obs = 46 -------------+------------------------------ F( 3, 42) = 30.56 Model | 3.26578172 3 1.08859391 Prob > F = 0.0000 Residual | 1.49618701 42 .0356235 R-squared = 0.6858 -------------+------------------------------ Adj R-squared = 0.6634 Total | 4.76196873 45 .105821527 Root MSE = .18874 ------------------------------------------------------------------------------ lcrmrte | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- lawexpc | -.0001274 .0000898 -1.42 0.163 -.0003086 .0000537 pcinc | .0000168 .0000172 0.98 0.334 -.0000179 .0000515 lcrmrt_1 | 1.197257 .127847 9.36 0.000 .9392514 1.455263 _cons | -.8982091 .6285827 -1.43 0.160 -2.16674 .3703221 ------------------------------------------------------------------------------ . log close log: C:\Documents and Settings\Patricia_Anderson\My Documents\ECON 20\I > nClass\oct28.log log type: text closed on: 28 Oct 2002, 12:25:57 -------------------------------------------------------------------------------