In recent years, states have launched several antitrust investigations targeting digital platforms. A major difficulty involves demonstrating the market power of digital platforms. Market power is defined as the control of the output or the price without the loss of business to competitors. As...

The internet giants - Facebook, Amazon, Netflix and Google, among others - have transformed society with both positive and negative effects. The negative effects have been stark. There have been huge disruptions caused by e-commerce. More recently, subtler, but even more serious negative effects...