This volume reports on the proceedings of the third international workshop on "Climate Change: Integrating Science, Economics, and Policy" held at IIASA in March 1996. Currently, it is widely recognized in both the analytical and policy communities that the complex issues surrounding the prospect of climate change and response measures and policies cannot be adequately assessed from the perspective of any single discipline in either the natural or social sciences, and that these issues cannot be resolved in the policy domain alone. This volume addresses these issues. The workshop focused on three related research areas in the economics of climate change: market and nonmarket impacts of climate change; costs and timing of greenhouse gas emissions abatement measures and strategies; and emissions reduction policies. This volume includes the revised versions of papers presented at the workshop.