Firm Heterogeneity, Technological Adoption, and Urbanization: Theory and Measurement Staff Working Paper 2017-27 Alex Chernoff This paper develops a model of firm heterogeneity, technological adoption, and urbanization. In the model, welfare is measured by household real income, and urbanization is measured by population density. I use the model to derive statistics that measure the effect of a new technology on productivity, welfare, and urbanization. Content Type(s): Staff research, Staff working papers Research Topic(s): Economic models, Productivity, Regional economic developments JEL Code(s): N, N6, N61, O, O1, O14, R, R1, R13