-------------------------------------------------------------------------------
       log:  d:\bill\fall2008\econ30331\bmi1.log
  log type:  text
 opened on:  26 Sep 2008, 09:52:17

. 
. * open data set
. use bmi1

. 
. 
. * describe data set
. desc

Contains data from bmi1.dta
  obs:         1,259                          
 vars:             9                          26 Sep 2008 09:45
 size:        33,993 (98.6% of memory free)
-------------------------------------------------------------------------------
              storage  display     value
variable name   type   format      label      variable label
-------------------------------------------------------------------------------
age             byte   %8.0g                  age in years
sex             byte   %8.0g                  =1 if male, =2 if female
income          int    %8.0g                  annual family income
educ            byte   %8.0g                  years of education
srhealth        byte   %8.0g                  self report
                                                health,1=excel,2=vgood,3=good,4
                                                =fair,5=poor
bmi             float  %9.0g                  body mass index
totalexp        long   %12.0g                 total annual expenditures on
                                                medical care
smoker          byte   %8.0g                  dummy variable, =1 if current
                                                smoker
race            float  %9.0g                  =1 if white non-hisp,=2 if
                                                black nonhisp,=3 other
                                                race,4=hispanic
-------------------------------------------------------------------------------
Sorted by:  

. 
. 
. * generate race dummy variables;
. gen black=race==2

. gen other_race=race==3

. gen hispanic=race==4

. label var black "=1 of black, non hispanic"

. label var other_race "=1 if other race, non hispanic"

. label var hispanic "=1 if hispanic"

. 
. 
. * generate overweight dummy
. gen overweight=bmi>=25

. label var overweight "dummy, =1 if overweight"

. 
. * get table of overweight
. tab overweight

  dummy, =1 |
         if |
 overweight |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        377       29.94       29.94
          1 |        882       70.06      100.00
------------+-----------------------------------
      Total |      1,259      100.00

. 
. * generate ln(income)
. gen incomel=ln(income)

. label var incomel "ln of family income"

. 
. * generate male
. gen male=sex==2

. label var male "=1 if male, 0 otherwise"

. 
. reg overweight age educ incomel male black hispanic other_race smoker

      Source |       SS       df       MS              Number of obs =    1259
-------------+------------------------------           F(  8,  1250) =   11.78
       Model |  18.5118546     8  2.31398183           Prob > F      =  0.0000
    Residual |  245.597756  1250  .196478205           R-squared     =  0.0701
-------------+------------------------------           Adj R-squared =  0.0641
       Total |  264.109611  1258  .209944047           Root MSE      =  .44326

------------------------------------------------------------------------------
  overweight |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         age |   .0075824   .0014394     5.27   0.000     .0047585    .0104063
        educ |  -.0129821   .0043338    -3.00   0.003    -.0214843   -.0044798
     incomel |  -.0151473   .0379148    -0.40   0.690     -.089531    .0592364
        male |    -.12196   .0252562    -4.83   0.000    -.1715093   -.0724108
       black |    .173329   .0364559     4.75   0.000     .1018075    .2448504
    hispanic |   .1104625   .0338091     3.27   0.001     .0441337    .1767913
  other_race |  -.0516011   .0513305    -1.01   0.315    -.1523045    .0491022
      smoker |  -.0178954   .0315521    -0.57   0.571    -.0797963    .0440056
       _cons |   .7245841   .3746124     1.93   0.053    -.0103544    1.459523
------------------------------------------------------------------------------

. 
. 
end of do-file

. exit
no; data in memory would be lost
r(4);

. clear

. exit, clear