Many businesses provide aftermarket services, including parts, maintenance, consulting, upgrades and modifications to durable consumer and business equipment. We investigate the effect on the original equipment manufacturer and on consumers if the manufacturer is the only (monopoly) service...

Between 1995 and 2004, I find that airline prices fell more than 20% adjusted for inflation. I also show that premia at hub airports declined and that there is now substantially less disparity between the cheaper and more expensive airports than there was a decade ago. Still, I find that prices...