Hello all. I could really use some help in writing a new glm link function in order to run an analysis of daily nest survival rates. I've struggled with this for weeks now, but I'm afraid I can't figure out even how to get started (fairly new at R, complete beginner in writing functions in R!). Essentially, all I will be doing is running a logistic regression, but with a different link function. The link function is a modification of the logit link: g(theta) = natural log( (theta ^(1/t)) / (1- (theta ^(1/t)) ) ; where t is the length of the interval between nest checks. Could anyone help? I hope the answer is rather simple, since this just adds the exponent (1/t) to the logit link function; but I have yet to figure out how to do this. Thanks in advance for any help. cheers, Jessi Brown Program in Ecology, Evolution, and Conservation Biology University of Nevada-Reno [[alternative HTML version deleted]]