Dafny, Leemore; Duggan, Mark; Ramanarayanan, Subramaniam - National Bureau of Economic Research (NBER) - 2009
We examine whether and to what extent consolidation in the U.S. health insurance industry is leading to higher employer-sponsored insurance premiums. We make use of a proprietary, panel dataset of employer-sponsored healthplans enrolling over 10 million Americans annually between 1998 and 2006...