Is the difficulty of purchasing health insurance as an individual or small business a major barrier to entrepreneurship in the United States? I answer this question by taking advantage of the natural experiment provided by the Affordable Care Act’s dependent coverage mandate, which allowed...

Since at least the early 1990s, economists have found substantial evidence of "job lock" in the United States: workers who get health insurance from their employer are less likely to switch jobs. Early work showed stronger job lock among groups that place a higher value on health insurance,...