Agreed... and there is certainly no reason to restrict the analysis to just two types of shops. However, fried chicken and coffee shops make for a really catch

Agreed... and there is certainly no reason to restrict the analysis to just two types of shops. However, fried chicken and coffee shops make for a really catchy way to introduce the possibilities of geo-analysis. I think maybe the point of the blog was to introduce a type of analysis, rather than to test for up and coming areas?