# Computer Exercises Econometrics

4874 WordsSep 27, 201020 Pages
Computer Exercises C1.2 Use the data in BWGHT.RAW to answer this question. . summ Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------------------------------- faminc | 1388 29.02666 18.73928 .5 65 cigtax | 1388 19.55295 7.795598 2 38 cigprice | 1388 130.559 10.24448 103.8 152.5 bwght | 1388 118.6996 20.35396 23 271 fatheduc | 1192 13.18624 2.745985 1 18 -------------+-------------------------------------------------------------------------------- motheduc | 1387…show more content…
Std. Err. t P>|t| [95% Conf. Interval] -------------+-------------------------------------------------------------------------------------------------------- lsales | .1621283 .0396703 4.09 0.000 .0838315 .2404252 lmktval |.106708 .050124 2.13 0.035 .0077787 .2056372 _cons | 4.620917 .2544083 18.160 .000 4.118794 5.123041 log(salary)=Bo+B1log(sales)+B2log(marketvalue)+u log(salary)=(0.1621283)log(sales)+(0.106708)(log(marketvalue)+4.620917 (ii) Add profits to the model from part (i). . regress lsalary lsales lmktval profits Source | SS df MS Number of obs = 177 -------------+---------------------------------------------------------- F( 3, 173) = 24.64 Model | 19.3509799 3 6.45032663 Prob > F = 0.0000 Residual | 45.2952332 173 .261822157 R-squared = 0.2993 -------------+---------------------------------------------------------- Adj R-squared = 0.2872 Total | 64.6462131 176 .367308029 Root MSE = .51169