'Living wage laws, which were introduced in the mid-1990s and have expanded rapidly since then, are typically touted as anti-poverty measures. Yet they frequently restrict coverage to employers with city contracts, and in such cases apply to a small fraction of workers. This apparent contradiction leads to the question of whether there are alternative motivations for various economic and political actors to seek passage of living wage laws. This paper considers the hypothesis that unions representing municipal employees work for the implementation of living wage laws to maintain of increase rents. By raising the wages that city contractors would have to pay, living wage laws may reduce the incentives for cities to contract out work that wou...