In July 1999, US Federal District Judge Thomas Penfield Jackson had to decide whether, as alleged by the US Department of Justice, Microsoft had illegally monopolized the supply of personal computer operating systems. The trial, originally expected to take two months from its October 19, 1998, starting date, had continued for eight months and generated two million pages of documentation. If he concluded that Microsoft had violated the Sherman Antitrust Act as charged, Judge Jackson had to decide what remedial measures he should order to be implemented. However he decided the complex issues before him, his opinion would have to be "bullet-proof," for the losing party would almost certainly appeal to the United States Supreme Court. HKS Case Number 1522.0

In the summer of 1993, Australia's Trade Practices Commission was considering whether or not to permanently enjoin Santos Limited from acquiring SAGASCO Holdings Limited. This merger was potentially of enormous significance, since Santos was the largest and SAGASCO the third largest on-shore natural gas producer in Australia. SAGASCO, which was fighting the takeover, argued that the merger would significantly reduce competition in the natural gas market. Santos countered that the gas industry was highly concentrated already and had always been disciplined by competition from other fuels. This case is primarily intended to illustrate the analysis of the competitive effects of a merger, but it can also be used to discuss the relationship between competition policy and the regulation of natural monopolies. HKS Case Number 1484.0

US price supports for domestically grown sugar become controversial because of their varying impacts on sugar-exporting nations, domestic sugar refiners and, of course, domestic growers. This case, told from the point of view of the Council of Economic Advisers, calls for an evaluation of the sugar price supports. It requires students to disentangle and quantify the complex resource allocation and income distribution consequences of the domestic sugar price support program. HKS Case Number 1128.0