1# 晓溪
可以采用stepwise命令,下面有具体举例。
Examples
Backward selection
. stepwise, pr(.2): reg price mpg weight displ
. stepwise, pr(.2): reg price mpg weight displ (r1-r4)
Backward hierarchical selection
. stepwise, pr(.2) hier: reg price mpg weight displ (r1-r4)
. stepwise, pr(.2) hier: reg price mpg (weight displ) (r1-r4)
Forward selection
. stepwise, pe(.2): logit outcome (sex weight) treated1 treated2
. stepwise, pe(.2) lock: logit outcome (sex weight) treated1 treated2
Forward hierarchical selection
. stepwise, pe(.2) hier: logit outcome (sex weight) treated1 treated2
. stepwise, pe(.2) lock hier: logit outcome (sex weight) treated1 treated2
Reporting saved results
. stepwise