With aging populations and increased demands on government revenue, countries need to boost employment and earnings. Tax policy should focus on labor market entry and retirement. Those are the points where labor supply is most responsive to tax incentives, which can enhance the flow into work of...

The control function approach (Heckman and Robb (1985)) in a system of linear simultaneous equations provides a convenient procedure to estimate one of the functions in the system using reduced form residuals from the other functions as additional regressors. The conditions on the structural...