Scholarly interest in the relationship between investment and displacement dates back to the 1970s, in the aftermath of displacement related to urban renewal. More recently, a new wave of scholarship examines gentrification, primarily in strong market cities, and its relationship to public investment, particularly in transit. The results of these studies are mixed, due in part to methodological shortcomings. A primary finding looking across the literature is that there is a need for a new methodology to analyze displacement risk.