search for: optioin

Dear list members, Is there a package somewhere for jointly estimating two poisson processes? I think the closest I've come is using the "SUR" option in the Zelig package (see below), but when I try the "poisson" option instead of the "SUR" optioin I get an error (error given below, and indeed, reading the documentation of the Zelig package, I get the impression "poisson" was not meant to handle a system of equations). I think I could do it myself by constructing the likelihood function and then applying ML, but I'd prefer to a...