Dan Chatman is Associate Professor and Chair of the Department of City and Regional Planning at UC Berkeley. He teaches graduate and undergraduate courses on transportation and land use planning, and conducts research on state policies to reduce VMT; travel behavior and the built environment; residential and workplace location choice; and the connections between public transportation, immigration and the economic growth of cities. Specific research topics include how app-based ride hailing services like Uber and Lyft affect auto use; which U.S. transit systems succeed and why; the implications of immigration trends for sustainable development and economic growth; the travel behavior of immigrants and people with disabilities; the relationship of public transportation investments to agglomeration economies in U.S. cities; the effect of dynamic pricing on the occupancy and use of on-street parking; and the relationship between residential location, commuting, and happiness.