Monopsonistic wage‐setting power requires that the supply of labor directed toward individual establishments is upward sloping. This study utilizes institutional features to identify the supply curve. The elasticity of labor supply is estimated using data for the Norwegian teacher labor market in a period where the only variation in the wage level was determined centrally and with information on whether there is excess demand or not at the school level. In fixed‐effects models, the supply elasticity faced by individual schools is estimated to about 1.4 and is in the range 1.0–1.9 in different model specification.

This paper utilizes a Norwegian experiment with exogenous wage changes to study teachers' turnover decisions. Within a completely centralized wage setting system, teachers in schools with a high degree of teacher vacancies in the past got a wage premium of about 10 percent during the period 1993–94 to 2002–03. The empirical strategy exploits that several schools switched status during the empirical period. In a fixed effects framework, I find that the wage premium reduces the probability of voluntary quits by six percentage points, which implies a short run labor supply elasticity of about 1¼.