Regional economic-development theorists have become increasingly focused on understanding what makes metropolitan economies grow. Richard Florida, the prime proponent of the “creative capital” perspective, argued that metropolitan economic development is extremely dependent on the presence of four main conditions: technology, talent, tolerance, and good quality of place. Particularly noteworthy in Florida’s discussion is the third element of this list, tolerance of diversity, which he defined as including tolerance for different sexual orientations, races, foreign-born backgrounds, and bohemian occupations. He presented tolerance as a key prerequisite for economic growth in the new, technologically based metropolitan economy. This article presents some of the findings of a study carried out for the state of Michigan in 2004-2005. This state, like others throughout the country, has sought to adopt an economic development theory that was grounded in empirical evidence and that could suggest necessary policy directions.