One cannot be a fully conversant antitrust practitioner or academic in today’s antitrust environment without a basic, if not sophisticated, understanding of markets involving multisided platforms or so-called ecosystems—multiple horizontal and vertical relationships that center around...

Microfinance institutions (MFIs) have been successful in providing credit to millions of low-income borrowers in groups previously excluded from formal financial services, but they often charge interest rates that many claim are excessive. We examine microfinance interest rates and their...