This article considers current proposals for patent law reform in light of a simple theory about intellectual property law: In a world without transaction costs, the assignment of property rights is not necessary to stimulate the optimal production of creative goods. Because potential users of...

Contrary to popular belief, the twentieth century was a good one for commercial apple varietal diversity. As measured by availability in commercial nursery catalogs, significant gains were made in both absolute number of apple varieties and the available number of pre-1900 historic varieties. In...

The conventional wisdom, as illustrated for millions of readers in the July 2011 issue of National Geographic, holds that the twentieth century was a disaster for crop diversity. In the popular press, this position is so entrenched that it no longer needs a citation. We conduct a study of all...