In spatial analysis, the Huff model is a widely used tool for predicting the probability of a consumer visiting a site, as a function of the distance of the site, its attractiveness, and the relative attractiveness of alternatives. It was formulated by David Huff in 1963.[1] It is used in marketing, economics, retail research and urban planning,[2] and is implemented in several commercially available GIS systems.
Its relative ease of use and applicability to a wide range of problems contribute to its enduring appeal.[3]
The formula is given as:
where :