Description Usage Format Details Source References Examples
The SPID data includes information on the year of adoption for over 700 policies in the American states.
1 |
The data comes in two objects of class data.frame
. The first
object, named policies
contains the adoption events. Each row
corresponds to an adoption event. Each adoption event is described by
the three columns:
statenam
: Name of the adopting state.
policy
: Name of the policy.
adopt_year
: Year when the state adopted the policy.
The second object (policies_metadata
) contains more details on each
of the policies. It contains these columns:
policy
: Name of the policy.
source
: Original source of the data.
first_year
: First year any state adopted this policy.
last_year
: Last year any state adopted this policy.
adopt_count
: Number of states that adopted this policy.
description
: Description of the policy.
majortopic
: Topic group the policy belongs to.
Both data.frame
objects can be joined (merged) on the common column
policy
(see example code).
This version 1.0 of the database. 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 24 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. Additional information on policies is available at the source repository.
https://doi.org/10.7910/DVN/CVYSR7
Boehmke, Frederick J.; Mark Brockway; Bruce A. Desmarais; Jeffrey J. Harden; Scott LaCombe; Fridolin Linder; and Hanna Wallach. 2018. "A New Database for Inferring Public Policy Innovativeness and Diffusion Networks." Working paper.
1 2 3 4 | data('policies')
# Join the adoption events with the metadata
merged_policies <- merge(policies, policies_metadata, by = 'policy')
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