Abstract
In this article, I explore how to identify zone pricing, highlighting its place in understanding the structure of grocery markets. Different definitions of price zones are discussed in terms of theory, assumptions, implementation and results. Lastly, two definitions in this paper are implemented and tested empirically on a novel scanner data set for the Norwegian grocery market, replicating the approach of a well regarded zone pricing article and comparing results to a new method. The goal of the discussion presented here is two-fold: To clarify the basic theory of price zone identification and to act as guidance for future research on zone pricing.