R help - Jan 2015 - Standard error of quasi-Poisson regression coefficients in mgcv

Hi, I am analyzing the relationship between animal density and several
environmental factors using GAM in mgcv. I used Poisson distribution and
quasi-Poisson model separately because there is overdispersion. In my model,
there is a categorical predictor variable "Year". However, when I
compared the outputs from Poisson and quasi-Poisson models, I realized that the
standard errors of "Year" from quasi-Poisson model were even a little
smaller than those from the Poisson model. Based on my knowledge, the standard
errors of quasi-Poisson regression coefficients should be larger than those from
Poisson model due to dispersion. Could anybody help me figure out what I was
doing wrong? Thank you very much!Hao
  		 	   		  
	[[alternative HTML version deleted]]