We consider environmental regulation in a context where firms invest in abatement technology under conditions of uncertainty about subsequent abatement cost, but can subsequently adjust output in the light of true marginal abatement cost. Where an emissions tax is the only available instrument,...

Nonlinear income taxes and linear commodity taxes are analyzed when people differ with respect to ability, high-skill agents have heterogeneous preferences, and neither individual abilities nor preferences are observable. We characterize pure income tax optima, which may be bunching or...

When a public good is excludable it is possible to charge individuals for using the good. We study the role of prices for publicly provided excludable public goods within an extension of the Stern-Stiglitz version of the Mirrlees optimal income tax model. We show that for a public consumer good...

A simple portfolio model is used to examine the efficiency effects of capital income taxes when the economy faces aggregate risk. To achieve a first best optimum the use of state contingent lump sum taxes is required. Through the tax policy the riskiness of total consumption is partly assigned...