proc reg data=a;
model loginvsum=roundbefore dummy_earlystage  dummy_2002 dummy_2003  dummy_2004 dummy_2005
dummy_internet dummy_IT dummy_energy dummy_communication
dummy_manufacture dummy_medical dummy_foreign dummy_institution dummy_investee
;
run;
然后再日志窗口出现;
Error:=
reg没有运行，谁知道这是怎么回事？