I'm using the MARK nest survival module and have a question about the SEs for some of the beta estimates. My real estimates look just fine, and some of my beta estimates for the covariates look good, but others are either giving me: a. SEs of 0.0000000 which seem highly unlikely, or b. really LARGE SEs (e.g., estimate of 0.025 and SE = 4,236). I don't know if this could possibly be a small sample size issue. My smallest sample sizes are for Year A: 37 and Year B: 20. Generally the problem occurs when the covariates are 1s and 0s (treatment vs. control, or comparing between 2 years). Sometimes even the Bo estimate has SE of 0.0000000. I believe my input file looks good and my models are correct, but perhaps I wouldn't be posting here if they were
Thanks for your help!