The effect of government spending on labor supply behavior is critical
to predicting the balanced-budget effect of income taxes and to estim
ating the marginal social cost of public funds. Yet, its very existenc
e, not to mention direction and magnitude, has not been empirically in
vestigated. This research estimates a labor supply function that incor
porates income taxation and government spending using microeconomic da
ta for men and women. The empirical results suggest that public sector
spending may have a significant effect on labor supply, thereby leadi
ng to estimates of the marginal social cost of public funds that diffe
r from those typically calculated.