Most theories of growth are developed at the macroeconomic level—at 30,000 feet. That perspective is good for spotting correlations between innovation and growth. To understand what causes growth, however, you have to crawl inside companies—and inside the minds of the people who invest in and manage them. This article (which builds on a New York Times piece Clay wrote in late 2012) is an attempt to form a theory from the ground up, by looking at company experience.
Unfit for Work: The startling rise of disability in America | Planet Money
Wow. “A chart of almsot all of it, where it is, and what it can do”