The Lock-In Effect of the Capital Gains Tax: Some Time Series Evidence

This study presents time-series evidence indicating that capital gains taxation reduces the realization of capital gains. The "lock-in" effect is detectable once we divide individuals into categories on the basis of how much recent capital gains tax in- creases have affected them. Since the tax law changes, those individeals who are affected have realized significantly ldss capital gains relative to those not affected. This analysis, in `ddition to evidence fpom cross-sectional research reported in Feldstein and Yitzhaki (1978) and Feldstein, Slemrod and Qitzhaki (1978),indicates that estimates of the tax revenue change resulting from a reduction in capital gains taxation based on the assumption of unchanged realized gains may be misleading.