*
* Example 5.2 from page 174
*
open data bwght.raw
data(format=free,org=columns) 1 1388 faminc cigtax cigprice bwght fatheduc motheduc $
 parity male white cigs lbwght bwghtlbs packs lfaminc
*
* The standard errors from a regression are provided in the vector %STDERRS after
* a LINREG. %STDERRS(2) is the standard error of the second coefficient, which is
* the one of interest.
*
linreg lbwght
# constant cigs lfaminc
compute stdfull=%stderrs(2)
linreg lbwght 1 694
# constant cigs lfaminc
compute stdhalf=%stderrs(2)
*
disp "Ratio of Standard Errors" stdfull/stdhalf