Policies to cap emissions of carbon dioxide (CO2), such as the recently announced agreement among seven northeastern states, are expected to have important effects on the electricity industry and on the market value of firms that own electricity generation assets. The economics literature finds...

How to set policy in the presence of uncertainty has been central in debates over climate policy. Concern about costs has motivated the proposal for a cap-and-trade program for carbon dioxide, with a quot;safety valvequot; that would mitigate against spikes in the cost of emission reductions by...