Noted, Diop is an assistant professor at the Wisconsin School of Business: A second paper, by economists James Conklin, Moussa Diop and Herman Li, used a very interesting method to evaluate one aspect of legal weed’s impact — they looked at house prices. When recreational cannabis was legalized, many medical marijuana dispensaries converted to retail marijuana stores. Conklin et al. found that near these stores, housing prices almost immediately rose by about 8 percent relative to houses in other areas.