DATA: FILE IS p2.dat;
VARIABLE: NAMES = Y X W U SIZE PROF STEX MACO
YEAR2016 YEAR2012 YEAR2015 YEAR2014 INDU;
USEVARIABLE = Y X W U SIZE PROF STEX
MACO YEAR2016 YEAR2012 YEAR2015 YEAR2014 INDU UW ;
define:UW=U*W;
ANALYSIS: Bootstrap=2000;
MODEL:
Y ON W(b1)
X
U
UW(b3)
SIZE PROF STEX MACO
YEAR2016 YEAR2012 YEAR2015 YEAR2014 INDU;
W ON X(a1);
U with W;
UW with W;
MODEL CONSTRAINT:
new(ind wmodval);
wmodval=-1;
ind=a1*(b1+b3*wmodval);
OUTPUT: cinterval (bcbootstrap);
ind=a1*(b1+b3*wmodval);[/这一句代码什么意思?有没有哪位大神可以帮忙解释一下,谢谢。
我的理解这是用Bootstrap法检验中介效应的差异,wmodval可以取上下一个标准差,不知理解是否准确。