The study conducted in the Buffalo, New York standard metropolitan statistical area, was undertaken to formulate and test a simple model of labor supply for a local labor market. The principal variables to be examined to determine the external supply function of labor to the establishment are variants of the rate of change of the entry wage and rate of change of the numbers of employed hourly workers in the establishment. The results of the investigation indicate that labor markets, when defined as relatively small geographic areas, have a stable long-run supply function that relates the annual rate of change in the establishment labor force to the annual rate of change of the hourly wage paid to the entry worker. (AG)