coef(3) beta
equation myols.ls gdp=beta(1)+beta(2)*fdi+beta(3)*trade
logl mylog
mylog.append @logl logme
mylog.append
res=gdp-beta(1)-beta(2)*fdi-beta(3)*trade
mylog.append sigma=@sum(res^2)
mylog.append
logme=log(@dnorm(res/@sqrt(sigma)))-log(sigma)/2
mylog.ml(showopts,m=1000,c=1e-5)
show mylog.output
说我res is not defined也不知是什么问题


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