本人在做相同模型分组检验的系数比较差异问题,用chow 检验的那个命令来做呢?下面是我写的,但是有错误,问题在哪里呢?我想看opinion_change的系数差异。
xi:probit change opinion_change total LEVV Growth sub1 if big4==1
est store bb
xi:probit change opinion_change total LEVV Growthh sub1 if big4==0
est store aa
suest bb aa
test [bb_mean = aa_mean]
报错
. test [bb_mean = aa_mean]
equation bb_mean not found
r(303);
求各位大神帮忙看看!不胜感激!悬赏论坛币!