sixtystrat wrote:Gary says that "If you have the same constraint on both phi and lambda, then the model would be valid (in that f would now have the same constraint)". So are you saying that is an invalid model as well? Section 13.4.1 was confusing (I RTFM) which is why I went to the Franklin (2001) paper and then to phidot in the first place. Thanks for clarifying.
Joe
I never apply constraints to lambda. Period. Suppose lambda has a trend? Whoo-pee. The question of interest is *why* is there a trend - which means, what is the pattern of variation/covariation in the processes (survival, recruitment) that influence lambda. If one is stationary, and the other trends, then guess what? lambda will trend also. I apply constraints to those lower-level parameter. Period.
As to Gary's approach, not one I prefer. Pick whatever one you want. Just don't apply a constraint to lambda alone, and then try to tell stories about phi and f.