*
* Example BIGCITY.DAT from pp 403-407
*
open data bigcity.dat
data(format=free,org=columns) 1 12 y x1 x2
*
cmom(corr,print)
# y x1 x2
*
@splom
# y x1 x2
*
linreg y
# constant x1
linreg y
# constant x2
*
linreg y
# constant x1 x2