ABSTRACT
Differences in property rights create a motive for trade among otherwise identical regions. Two regions with identical technologies, endowments, and preferences will trade if one, the South, has ill-defined property rights on environmental resources. Trade with a region with well-defined property rights transmits and enlarges the problem of the commons: the North overconsumes underpriced resource-intensive products imported from the South. This occurs even though trade equalizes all prices, of goods and factors, worldwide. Taxing the use of resources in the South is unreliable as it can lead to more overextraction. Property-rights policies may be more effective.
