Can a sports franchise "blackmail" a city into getting what it wants--a new stadium, say, or favorable leasing terms--by threatening to relocate? In 1982, the owners of the Chicago White Sox pledged to keep the team in Chicago if the city approved a $5-million tax-exempt bond to finance construction of luxury suites at Comiskey Park. The city council approved it. A few years later, when Comiskey Park was in need of renovation, the owners threatened...