This paper analyzes the optimal income tax treatment of couples. Each couple is modelled as a single rational economic agent supplying labor along two dimensions: primary and secondary earnings. We consider fully general joint income tax systems. Separate taxation is never optimal if social...

This paper extends the theory and measurement of the marginal cost of public funds (MCF) to account for labour force participation responses. Our work is motivated by the emerging consensus in the empirical literature that extensive (participation) responses are more important than intensive...

This Paper estimates the welfare and distributional impact of two types of welfare reform in 14 member countries of the European Union. The reforms are revenue neutral and financed by an overall and uniform increase in marginal tax rates on earnings. The first reform distributes the additional...

Consumption theory predicts that the cost of liquidity determines spending responses to a stimulus. We test this hypothesis directly using administrative records of individual-level loan and deposit accounts in combination with a Danish fiscal stimulus reform transforming illiquid pension wealth...

Inspired by Hayek (1945), we study the distortionary effects of taxation on labor mobility and the long run allocation of labor across different profitable opportunities. These effects are not well detected by the methods applied in the large public finance literature estimating the elasticity...

Intertemporal shifting of wage income takes place when income earned in one tax year is paid out in another tax year in order to save taxes. Shifting has implications for the evaluation of the distortionary and distributional effects of taxes and may cause serious bias in empirical estimates of...

If productivity increases more slowly for services than for manufactured goods, then services suffer from Baumol’s cost disease and tend to become relatively more costly over time. Since the welfare state in all countries is an important supplier of tax financed services, this translates into...