We introduce a method for estimating the cost of adjusting earnings, as well as the earnings elasticity with respect to the net-of-tax share. Our method uses information on bunching in the earnings distribution at convex budget set kinks before and after policy-induced changes in the magnitude of the kinks: the larger is the adjustment cost, the smaller is the absolute change in bunching from before to after the policy change. In the context of the Social Security Earnings Test, our results demonstrate that the short-run impact of changes in the effective marginal tax rate can be substantially attenuated.
Gelber, Alexander M., Damon Jones, and Daniel W. Sacks.
"Estimating Adjustment Frictions Using Nonlinear Budget Sets: Method and Evidence from the Earnings Test."
American Economic Journal: Applied Economics,
Personal Income and Other Nonbusiness Taxes and Subsidies; includes inheritance and gift taxes
Fiscal Policies and Behavior of Economic Agents: Household
Social Security and Public Pensions
Time Allocation and Labor Supply
Wage Level and Structure; Wage Differentials