“…These empirical studies have found that larger and thicker urban labor markets enhance worker productivity by allowing for a greater specialization of professional activities (Baumgardner, 1988;Garicano and Hubbard, 2007); helping to solve dual-career problems (Costa and Kahn, 2000); facilitating more assortative matching between workers and firms (Andersson, Burgess, and Lane, 2007); improving the efficiency of job search (Yankow, 2009;Di Addario, 2011), and reducing labor market churn (Wheeler, 2008;Bleakley and Lin, 2012). While this work has improved our understanding of the benefits of urban agglomeration, the empirical evidence surrounding job matching as a source of urban agglomeration economies remains, so far, largely indirect in nature.…”