In-work support through the tax-benefit system has proved to be an effective way of increasing the labor supply of lone mothers and first earners in couples in a number of OECD countries. At the same time, these instruments usually create negative employment incentives for secondary earners....

We examine the consequences of changes in work incentives in Poland between 2005 and 2011 resulting from a complex tax and benefit reform package and substantial real wage growth. While marginal and participation tax rates (PTRs) in the majority of analysed cases fall as a result of the...