In this paper, we propose a new measure to understand policy connections between the states. For decades, diffusion scholars have relied on the largely untested assumption that contiguous states are more similar than noncontiguous states, despite evidence that similarity is more complex than geographic proximity. We use a unique survey of citizens’ perceptions of other states to construct a national network of similarity ties between the states. We apply this new measure with a data set of state policy adoptions in a dyadic and monadic event history analysis and find that similar state adoptions are a reliable predictor of policy innovation. We argue that perceived state similarity is a more complete measure of how states look to each other than contiguity.
BaybeckBradyBerryWilliam D.SiegelDavid A. 2011. “A Strategic Theory of Policy Diffusion via Intergovernmental Competition.” The Journal of Politics73 (1): 232–47.
2.
BerryFrances StokesBerryWilliam D. 1990. “State Lottery Adoptions as Policy Innovations: An Event History Analysis.” American Political Science Review84 (2): 395–415.
3.
BerryWilliam D.BaybeckBrady. 2005. “Using Geographic Information Systems to Study Interstate Competition.” American Political Science Review99 (4): 505–19.
4.
BerryWilliam D.FordingRichard C.HansonRussell L. 2003. “Reassessing the ‘Race to the Bottom’ in State Welfare Policy.” The Journal of Politics65 (2): 327–49.
5.
BerryWilliam D.FordingRichard C.RingquistEvan J.HansonRussell L.KlarnerCarl E. 2010. “Measuring citizen and government ideology in the US states: A re-appraisal.” State Politics & Policy Quarterly10 (2): 117–35.
6.
BoehmkeFrederick J.2009. “Policy Emulation or Policy Convergence? Potential Ambiguities in the Dyadic Event History Approach to State Policy Emulation.” The Journal of Politics71 (3): 1125–40.
7.
BoehmkeFrederick J.BrockwayMarkDesmaraisBruceHardenJeffrey J.LaCombeScottLinderFridolinWallachHannah. 2019. “SPID: A New Database for Inferring Public Policy Innovativeness and Diffusion Networks.” Policy Studies Journal. Published electronically June 11. doi:10.1111/psj.12357.
BousheyGraeme. 2012. “Punctuated Equilibrium Theory and the Diffusion of Innovations.” Policy Studies Journal40 (1): 127–46.
10.
BurtRonald S.MinorMichael J. 1983. Applied Network Analysis: A Methodological Introduction. Beverly Hills: SAGE.
11.
ButlerDaniel M.VoldenCraigDynesAdam M.ShorBoris. 2017. “Ideology, Learning, and Policy Diffusion: Experimental Evidence.” American Journal of Political Science61 (1): 37–49.
12.
ChinniDanteGimpelJames. 2011. Our Patchwork Nation: The Surprising Truth about the “Real” America. New York: Penguin Books.
Council of State Government. 2018. The Book of the States. Lexington, KY: Council of State Government.
15.
CrainRobert L.1966. “Fluoridation: The Diffusion of an Innovation among Cities.” Social Forces44 (4): 467–76.
16.
DesmaraisBruce A.HardenJeffrey J.BoehmkeFrederick J. 2015. “Persistent Policy Pathways: Inferring Diffusion Networks in the American States.” American Political Science Review109 (2): 392–406.
17.
ElazarDaniel Judah. 1966. American Federalism—A View from the States. London: Thomas Cromwell.
18.
FriedkinNoah E.2006. A Structural Theory of Social Influence. Vol. 13. Cambridge: Cambridge University Press.
19.
GarrettKristin N.JansaJoshua M. 2015. “Interest Group Influence in Policy Diffusion Networks.” State Politics & Policy Quarterly15 (3): 387–417.
20.
GilardiFabrizio. 2016. “Four Ways We Can Improve Policy Diffusion Research.” State Politics & Policy Quarterly16 (1): 8–21.
21.
GrayVirginia. 1973. “Innovation in the States: A Diffusion Study.” American Political Science Review67 (4): 1174–85.
22.
HeroRodney E.2000. Faces of Inequality: Social Diversity in American Politics. New York: Oxford University Press.
23.
HeroRodney E.TolbertCaroline J. 1996. “A Racial/Ethnic Diversity Interpretation of Politics and Policy in the States of the U.S.” American Journal of Political Science40 (3): 851–71.
24.
HuckfeldtR. Robert. 1979. “Political Participation and the Neighborhood Social Context.” American Journal of Political Science23 (3): 579–92.
25.
HuckfeldtR. Robert. 1983. “Social Contexts, Social Networks, and Urban Neighborhoods: Environmental Constraints on Friendship Choice.” American Journal of Sociology89 (3): 651–69.
26.
HuckfeldtR. RobertSpragueJohn. 1988. “Choice, Social Structure, and Political Information: The Information Coercion of Minorities.” American Journal of Political Science32 (2): 467–82.
27.
HuckfeldtR. RobertSpragueJohn. 1991. “Discussant Effects on Vote Choice: Intimacy, Structure, and Interdependence.” The Journal of Politics53 (1): 122–58.
28.
HuckfeldtR. RobertSpragueJohn. 1995. Citizens, Politics and Social Communication: Information and Influence in an Election Campaign. Cambridge: Cambridge University Press.
29.
IacobucciaDawnNeelameghambR.HopkinsNigel. 1999. “Measurement Quality Issues in Dyadic Models of Relationships.” Social Networks21 (3): 211–37.
30.
KlofstadCasey A.McClurgScott D.RolfeMeredith. 2009. “Measurement of Political Discussion Networks: A Comparison of Two “Name Generator” Procedures.” Public Opinion Quarterly73 (3): 462–83.
31.
KnokeDavid. 1999. Political Networks: The Structural Perspective. Cambridge: Cambridge University Press.
32.
KreitzerRebecca J.BoehmkeFrederick J. 2016. “Modeling Heterogeneity in Pooled Event History Analysis.” State Politics & Policy Quarterly16 (1): 121–41.
33.
LazarsfeldPaul F.MertonRobert K. 1954. “Friendship as a Social Process: A Substantive and Methodological Analysis.” In Freedom and Control in Modern Society, edited by BergerMorroeAbelTheodore, 18–66. New York: Van Nostrand.
34.
LieskeJoel. 1993. “Regional Subcultures of the United States.” The Journal of Politics55 (4): 888–913.
35.
LieskeJoel. 2010. “The Changing Regional Subcultures of the American States and the Utility of a New Cultural Measure.” Political Research Quarterly63 (3): 538–52.
36.
MaggettiMartinoGilardiFabrizio. 2016. “Problems (and Solutions) in the Measurement of Policy Diffusion Mechanisms.” Journal of Public Policy36 (1): 87–107.
37.
MallinsonDaniel J.2019. “Who Are Your Neighbors? The Role of Ideology and Decline of Geographic Proximity in the Diffusion of Policy Innovations.” Policy Studies Journal. Published electronically June 18. doi:10.1111/psj.12351.
38.
McClurgScott D.KlofstadCasey A.SokheyAnand Edward. 2017. “Discussion Networks.” In The Oxford Handbook of Political Networks, edited by VictorJennifer NicollMontgomeryAlexander H.LubellMark, 525–36. Oxford: Oxford University Press.
Nicholson-CrottySeanCarleySanya. 2018. “Information Exchange and Policy Adoption Decisions in the Context of U.S. State Energy Policy.” State Politics & Policy Quarterly18 (2): 122–47.
41.
PachecoJulianna. 2012. “The Social Contagion Model: Exploring the Role of Public Opinion on the Diffusion of Antismoking Legislation across the American States.” The Journal of Politics74 (1): 187–202.
42.
SharkanskyIra. 1970. Regionalism in American Politics. New York: Bobbs-Merrill.
43.
SharkanskyIraHofferbertRichard I. 1969. “Dimensions of State Politics, Economics, and Public Policy.” American Political Science Review63 (3): 867–79.
44.
ShipanCharles R.VoldenCraig. 2008. “The Mechanisms of Policy Diffusion.” American Journal of Political Science52 (4): 840–57.
45.
ShipanCharles R.VoldenCraig. 2012. “Policy Diffusion: Seven Lessons for Scholars and Practitioners.” Public Administration Review72 (6): 788–96.
46.
SkvoretzJohn. 1985. “Random and Biased Networks: Simulations and Approximations.” Social Networks7 (3): 225–61.
47.
SkvoretzJohn. 1990. “Biased Net Theory: Approximations, Simulations, and Observations.” Social Networks12 (3): 217–38.
48.
SkvoretzJohnFararoThomas J.AgneessensFilip. 2004. “Advances in Biased Net Theory: Definitions, Derivations, and Estimations.” Social Networks26 (2): 113–39.
49.
SpragueJohn. 1976. “Estimating a Boudon Type Contextual Model: Some Practical and Theoretical Problems of Measurement.” Political Methodology3 (3): 333–53.
50.
SquirePeverill. 2007. “Measuring State Legislative Professionalism: The Squire Index Revisited.” State Politics & Policy Quarterly7 (2): 211–27.
51.
VoldenCraig. 2006. “States as Policy Laboratories: Emulating Success in the Children’s Health Insurance Program.” American Journal of Political Science50 (2): 294–312.
52.
VoldenCraigTingMichael M.CarpenterDaniel P. 2008. “A Formal Model of Learning and Policy Diffusion.” American Political Science Review102 (3): 319–32.
53.
WalkerJack L.1969. “The Diffusion of Innovations among the American States.” American Political Science Review63 (3): 880–99.
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