State Policy Innovation and Diffusion (SPID) Database v1.2doi:10.7910/DVN/CVYSR7Harvard Dataverse2018-05-046Frederick J. Boehmke; Mark Brockway; Bruce Desmarais; Jeffrey J. Harden; Scott LaCombe; Fridolin Linder; Hanna Wallach, 2018, "State Policy Innovation and Diffusion (SPID) Database v1.2", https://doi.org/10.7910/DVN/CVYSR7, Harvard Dataverse, V6, UNF:6:mwdxmIaqMAg1URlA4kCX8g== [fileUNF]State Policy Innovation and Diffusion (SPID) Database v1.2SPID v1.2doi:10.7910/DVN/CVYSR7Frederick J. BoehmkeMark BrockwayBruce DesmaraisJeffrey J. HardenScott LaCombeFridolin LinderHanna WallachHarvard DataverseFrederick J. BoehmkeFrederick J. Boehmke2021-06-21SPIDSocial Sciencespublic policypolicy diffusioninnovativenessThe 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. <p><p> 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.16912017event data<a href="http://creativecommons.org/publicdomain/zero/1.0">CC0 1.0</a>Boehmke, Frederick J.; Mark Brockway; Bruce A. Desmarais; Jeffrey J. Harden; Scott LaCombe; Fridolin Linder; and Hanna Wallach. 2020. “SPID: A New Database for Inferring Public Policy Innovativeness and Diffusion Networks.” Policy Studies Journal 48(2): 517-545.10.1111/psj.12357Boehmke, Frederick J.; Mark Brockway; Bruce A. Desmarais; Jeffrey J. Harden; Scott LaCombe; Fridolin Linder; and Hanna Wallach. 2020. “SPID: A New Database for Inferring Public Policy Innovativeness and Diffusion Networks.” Policy Studies Journal 48(2): 517-545.SPID_v1.2.tab178233text/tab-separated-valuesUNF:6:d79LleQNoN7XQJ1N98OKoQ==Data on adoption years by state and policy.SPID_v1.2_changes.tab1444text/tab-separated-valuesUNF:6:1Xqbd/FMNNXyK1UQV7b1cQ==Listing of changes in adoptions data from the previous version.SPID_v1.2_policies.tab7248text/tab-separated-valuesUNF:6:Pu5p413DaR+ovCSLatWOpg==Data on policies - source, topic code (from PAP), and adoption summary statistics.Policy NameUNF:6:sQJBGImVhuC/JdrtwLzf+w==State NameUNF:6:q0euqIjK/bk4DBf0/UED7A==Year of Adoption2017.0.1691.01975.93098804915050.034.13883501010041517823.01988.0UNF:6:LgFC1TLFG3Cg9aiAytkrdw==statusUNF:6:dqCp5lq9A6Hs40tkbomxSg==policyUNF:6:mlwhna+DE3bjQWo3EbokgA==statenamUNF:6:rU2s0t92iZtsdVxmzzNW7Q==adopt_year1964.68751982.52014.0.1896.039.57527460599434144.00.0UNF:6:T04llurfED/Vys3X4eTjYQ==Policy NameUNF:6:jqxQTLuR+9YSgeZitO0YKA==First Year Policy Adopted.1971.738950276243724.01691.036.834639674465840.02017.01981.0UNF:6:puQOzh2H7kbIcAB5WoDIFg==Last Year Policy Adopted.2017.01993.42679558011060.02001.0724.01860.023.43913338734722UNF:6:dIE3/yOIkexT3YDsyej6Mg==Number of Adoptions724.0.23.015.9369878121037141.024.6174033149171350.00.0UNF:6:5xYUlNPUU8ZwKDjh/k9MTg==Data SourceUNF:6:wXIZoUoqa4MM3ilQ2gwuag==Policy DescriptionUNF:6:KmxRFsGomtGVdRRNQPQNTQ==Policy Agendas Major Topic Code (numeric).1.00.0724.021.010.09.0925414364640875.41357339791903718Foreign Trade216Defense34Agriculture41Macroeconomics2115Domestic Commerce8110Transportation4112Law and Crime19421Public Lands79Immigration217Technology223Culture014Housing247Environment168Energy1719International Affairs224Local Government and Governance03Health695Labor272Civil Rights11120Government Operations306Education5713Social Welfare14UNF:6:AHno71OVEjeDDKKkeR8vJw==Policy Agendas Major Topic Code (string)UNF:6:FUN6dAtWBILP3DbjkQmQ2A==SPID_v1.2_Documentation.pdfDocumentation on policy collection and coding.application/pdf