In most western economies the service industries have risen steadily. One possible reason for this growth could be the shift of home production of services into market production as a result of increasing female labor participation (shift effect). To specify the determinants of the quantity of services bought the well-known model of the allocation of time is extended to incorporate the demand for services and goods, home production and female labor supply. With reference to this model a macroeconomic consumer's demand function for services is developed which separates the effect on the demand for services due to rising income from that due to increasing female labor participation. The econometric estimations of the demand function show that over the last twenty years in the FRG a shift effect exists which is smaller than in other western economies.