Joseph Isenbergh, a professor at the University of Chicago Law School, discusses his new essay about open versus closed operating systems, their respective marketing strategies, and their influence on the smartphone market. Isenbergh talks about early competition between Macintosh, with its closed operating system integrated with its PC hardware, and Microsoft, with its openly-licensed operating system that could be installed on any PC. He discusses the trade-off between open platforms that offer lots of consumer choice and the ostensible enhanced user experience created by bundling software with hardware. Isenbergh speculates about the future of the smartphone market, Apple’s iOS, and Google’s Android. He also comments on VHS versus Sony Betamax recording systems, tie-in strategies in wine-selling, and Blu-ray versus HD-DVD formats.