The dynamic path of accumulation in a neo-classical economy can be described by a differential equation in the time rate of change of the per capita capital stock. In the theory of differential equations there is a technique for examining the change of the solution of a differential equation...

Redistribution programs are constrained because those not working may be either unable to work, voluntarily unemployed or involuntarily unemployed. The inability to distinguish among these three cases inhibits the targeting of transfers to those most in need. Enabling the government to monitor...

An optimal commodity tax approach is taken to compare trade taxes and VATs when some commodities are produced informally. Trade taxes apply to all imports and exports, including intermediate goods while the VAT applies only to sales by the formal sector and imports. The VAT can achieve...

This paper analyzes government policy when random shocks affect particular industries, occupations or regions. Workers can freely choose and industry or occupation ex ante, and can relocate at a cost, once uncertainty is resolved. The policy instruments available are per capita taxes and...

This paper, prepared for the Handbook of Income Distribution (edited by A.B. Atkinson and F. Bourguignon), reviews some of the central issues that arise in thinking about the motives for, politics of, constraints on and measurement of, redistribution. Amongst the themes are: the potential...

This Paper starts from the result of Rochet (1989), that with distortionary income taxes social insurance is a desirable redistributive device when risk and ability are negatively correlated. This finding is re-examined when ex post moral hazard and adverse selection are included, and under...

This paper summarizes James Mirrlees' key contribution to the theory of tax policy. It argues that the Mirrlees approach of viewing government as being constrained by imperfect information has changed profoundly how we look at the normative public policy. In this view, asymmetric information...