Thesis: Ph. D., Massachusetts Institute of Technology, Department of Economics, 2015.Chapter 2 co-authored with Michael Greenstone and Alexandre Mas. Cataloged from PDF version of thesis.Includes bibliographical references (pages 99-105).This thesis consists of three chapters on banking and local credit markets. The first chapter studies the relationship between bank-specific capital and credit access in a new setting: bank branch closings in markets where the branch network is dense. Existing regulation in the U.S. is targeted toward areas with few branches where closings inhibit physical access to the branch network. I show that, even in crowded markets, closings can have large effects on local credit supply. To generate plausibly exogeno...