Tom Tietenberg, Mitchell Family Professor of Economics at Colby College, recently headed a team of economists assembled by the United Nations to help implement U.N. initiatives to combat global warming. Tietenberg is a pioneer in the concept of tradable emission permits, used to regulate the release of damaging greenhouse gases.

On November 6 in Buenos Aires, Argentina, at U.N.-sponsored meetings on climate change, Tietenberg will present conclusions of a report that his team of economists wrote. When he returns to Maine he will speak at Colby College on Monday, Nov. 16, presenting an overview of "The Economics of Global Warming." That talk, at 4 p.m. in Olin 01, is open to the public free of charge. It will include reports on his work on emissions trading proposals that came out of last December's U.N. summit on climate change in Kyoto, Japan.

Tietenberg's U.N. team was commissioned to assemble a report to fill in details on the emissions trading program. That report, completed in late August, can be downloaded from the World Wide Web by visiting http://www.weathervane.rff.org/reports/ or http://www.colby.edu/personal/thtieten/

Tietenberg said thousands of copies of the report have been downloaded since it was posted on the web.