Amazon disrupts everything it touches and upends any market it enters. In the era of its game-changing dominance, how can any company compete? We are just witnessing the start of the radical changes in retail that will revolutionize shopping in every way. As Amazon and other disruptors continue...

"Prices in government and employer-sponsored health insurance markets only partially reflect insurers' expected costs of coverage for different enrollees. This can create inefficient distortions when consumers self-select into plans. We develop a simple model to study this problem and estimate...