In 1976, a group of Italian American professors at City University of New York asked to be added as an affirmative action category for promotion and hiring. Italian Americans are usually considered white in the US and would not be covered under affirmative action policies, but the professors believed they were underrepresented. Libertarian economist Thomas Sowell wrote in his book, Affirmative Action Around the World: An Empirical Study, that affirmative action policies encourage non-preferred groups to designate themselves as members of preferred groups [i.e., primary beneficiaries of affirmative action] to take advantage of group preference policies.