Background: Many people work in industries where there are points of the year when your life gets "busier." The holiday season for those of you in retail, tax season for the accountants, etc. We can use past data to predict what we may expect during our busy season. This will help with staffing and keeping those shelves stocked.

Question: (Including citation(s) and reference(s)), how can we predict the sales for a new product or entry into a new market where past data is unavailable?

Reference(s) and citation(s) greatly appreciated.