From my reading so far, GWR uses the Gaussian or bisquare distribution. My dependent and explanatory variables are rates. I was reading Chapter 12 of Spatial Statistical Data Analysis for GIS Users by Krivoruchko and saw this:
"For non-Gaussian data, gwr can be used with Poisson regression when input data are counts or rates and with logistic regression when data are binary or proportions."
How do I test my data to determine if I should use Gaussian, bisquare or the Poisson for my GWR analysis? What are the key differences between them? Since I was going to use ArcGIS for the GWR, is there a way I can select the Poisson?