这个语句一定有问题,在stata8里,做stepwise是用sw的(在stata9里又是stepwise了)
而且它后面要加command的,看你的语句是做panel data的回归的样子(fe——fixed effect?)
sw,好像不支持的。
sw cmd term [term ...] [weight] [if exp] [in range], { pr(#) | pe(#) | pr(#) pe(#) } [ forward
lr hier lockterm1 cmd_options ]
where term is either a varname or (varlist) (a varlist in parentheses) and cmd is one of
clogit | cloglog | cnreg | glm | logistic | logit | nbreg | ologit | oprobit | poisson | probit
| qreg | regress | stcox | streg | tobit