Regional Influences and Environmental Policymaking: A Study of Acid Rain
A four-region classification of states is used to examine the impact of regionalism on the acid rain policy debate. It was found that a state's activity level was significantly influenced by its commitment to environmental protection and its regional differentiation.
Alm, Leslie R.. (1993). "Regional Influences and Environmental Policymaking: A Study of Acid Rain". Policy Studies Journal, 21(4), 638-650. http://dx.doi.org/10.1111/j.1541-0072.1993.tb02163.x