10.7910/DVN/CVYSR7
Frederick J. Boehmke
Frederick
J. Boehmke
https://orcid.org/0000-0003-3309-0885
University of Iowa
Mark Brockway
Mark
Brockway
University of Notre Dame
Bruce Desmarais
Bruce
Desmarais
https://orcid.org/0000-0002-3031-8883
Penn State University
Jeffrey J. Harden
Jeffrey
J. Harden
https://orcid.org/0000-0001-5337-7918
University of Notre Dame
Scott LaCombe
Scott
LaCombe
https://orcid.org/0000-0003-0653-4006
University of Iowa
Fridolin Linder
Fridolin
Linder
https://orcid.org/0000-0002-0499-0676
Penn State University
Hanna Wallach
Hanna
Wallach
Microsoft Research NYC and UMass
State Policy Innovation and Diffusion (SPID) Database v1.2
SPID v1.2
Harvard Dataverse
2018
Social Sciences
public policy
policy diffusion
innovativeness
Frederick J. Boehmke
Frederick
J. Boehmke
University of Iowa
2021-06-21
2018-05-04
2021-07-12
event data
10.1111/PSJ.12357
109031
659551
81698
149072
646992
71070
79217
647019
149197
88278
290543
647462
89972
5133
648436
7656
166869
89582
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6.0
Creative Commons CC0 1.0 Universal Public Domain Dedication.
The SPID data include information on the year of adoption for over 700 policies in the American states. For each policy we document the year of first adoption for each state. Adoption dates range from 1691 to 2017 and includes all fifty states. Policies are adopted by anywhere from 1 to 50 states, with an average of 25 adoptions. The data were assembled from a variety of sources, including academic publications and policy advocacy/information groups. Policies were coded according to the Policy Agendas Project major topic code.
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Version 1.2 includes a small number of corrections to the previous version. These are summarized in the documentation and listed in the changes spreadsheet.
SPID