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2. Akerlof, George, and Janet Yellen, ``Gang Behavior, Law Enforcement, and Community Values,'' in Henry Aaron, Thomas Mann, and Timothy Taylor, eds., Values and Public Policy (Washington, DC: Brookings Institution, 1994).
3. The Wage Policy of a Firm
4. Block, Carolyn B., and Richard Block, ``Street Gang Crime in Chicago,'' Research in Brief, National Institute of Justice, Office of Justice Programs, U. S. Department of Justice, 1993.