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Financial tool considered climate change uncertainty to select land for conservation
Date:5/21/2012

URBANA - A tool commonly used by financial strategists to determine what shares to purchase to create a diversified stock portfolio was used to develop a diversified portfolio of another kind -- land to be set aside for conservation purposes given the uncertainty about climate change.

Instead of plugging into the formula the data for the history of a stock, University of Illinois environmental economist Amy Ando and agricultural economist Mindy Mallory used the historical climate data of the Prairie Pothole Region of the northern Great Plains to develop a new application of the financial tool called the Modern Portfolio Theory.

"It's a very well-known tool in finance," said agricultural economist Mindy Mallory. "There are many tools that are widely available to solve a portfolio problem. So it was really just a new marriage of the tool with a different kind of portfolio problem."

Mallory and Ando used the Modern Portfolio Theory to develop a diversified land portfolio for conservation in the Prairie Pothole Region. The region contains thousands of shallow wetlands created by glaciers and serves as breeding grounds for almost 200 species of migratory birds. The region is about 276,000 square miles and includes portions of Saskatchewan, Manitoba, and Alberta in Canada and Minnesota, Iowa, North and South Dakota, and Montana in the United States.

Ando said the U.S. Fish and Wildlife Service has already protected over 3 million acres in the region and seeks to quadruple that investment. The techniques incorporated in this study could help them make decisions based on the cost, risks, and benefits of the land.

Mallory explained that in the stock analogy, simple diversification would be like someone buying one of every kind of stock in the entire market. Ando seconded that simple land diversification, such as buying one acre in every county, would be just as farfetched a plan.

"For a long time, uncertainty due to
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Contact: Debra Levey Larson
dlarson@illinois.edu
217-244-2880
University of Illinois College of Agricultural, Consumer and Environmental Sciences
Source:Eurekalert

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