I am very new to R. I am using R package "pscl" for hurdle regression (Binary with "cloglog" link and Poisson with "log" link). My problem is to model road crash frequencies at given locations as a function of road geometry and surface condition. All of my dependent variable are covariates. I want to test their marginal effects on the response. However, I am hard-pressed to find a way to do that. I just wish to ask if there is a way at all to accomplish this in R? Or is there any other better way to quantify the impact of individual variables on the response for hurdle regression? Thanks in advance.

	[[alternative HTML version deleted]]

