Complementarity between leisure time and market recreation is estimated empirically by regressing the demand for leisure time of U.S. employees in the 1900-1961 period on the relative price of recreational goods and services, holding real income and the relative price of leisure time constant. The results support the complementarity hypothesis: about 25 percent of the estimated long-term increase in the demand for leisure is explained by a decline in market recreation prices. An observed negative partial regression of the demand for market recreation on the relative price of leisure time further supports the notion that the two goods are closely related.