1Edward Alan Miller. Advancing Comparative State Policy Research: Toward Conceptual Integration and Methodological Expansion [ J]. State and Local Government Review, 2004, 36 ( 1 ) : 35 - 58.
2Frederick J. Buehmke. Approaches to Modeling the Adoption and Diffusion of Policies with Multiple Components [ J]. State Politics and Policy Quarterly, 2009, 9 (2): 230, 232, 234.
3Charles R. Shipan, Craig Volden. The Mechanisms of Policy Diffusion [J]. American Journal of Political Science, 2008, 52 (1) : 840 -857.
4Graeme Boushey. Punctuated Equilibrium Theory and the Diffusion of Innovations [J]. The Policy Studies Journal, 2012, 40 (1) : 127 -146.
5Volden, Craig. States as Policy Laboratories: Emulating Success in the Children Health Insurance Program [J]. American Journal of Political Sci- ence, 2006, 50 (2): 294-312.
6Mooney, Christopher Z. Modeling Regional Effects on State Policy Dif- fusion [J]. Political Research Quarterly, 2001, 54 (1): 103-124.
7Peter Starke. Qualitative Methods for the Study of Policy Diffusion: Challenges and Available Solutions [ J ]. The Policy Studies Journal, 2013, 41 (4): 561-582.
