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confdata
2007 Apr 09
1
R:Maximum likelihood estimation using BHHH and BFGS
Dear R users,
I am new to R. I would like to find *maximum likelihood estimators for psi
and alpha* based on the following *log likelihood function*, c is
consumption data comprising 148 entries:
fn<-function(c,psi,alpha)
{
s1<-sum(for(i in 1:n){(c[i]-(psi^(-1/alpha)*(lag(c[i],-1))))^2*
(lag(c[i],-1)^((-2)*(alpha+1))
)});
s2<- sum(for(m in 1:n){log(lag(c[m],-1)^(((2)*alpha)+2))});