Business location statistics.

I'm interested in researching business statistics and possible factors involved which will determine a good business location. For example, If I am to open up an ice cream shop and I have a targeted customer group of people (non gender specific) from the age of 15-45. What should I look at?

I'm thinking I would look at median household income for that area, population size, age demographics, etc.

Does anybody know anything regarding this? Any references?

Thank you for any input! :cool: