10.7910/DVN/LFLCMA Frey, Anderson Anderson Frey University of Rochester Lopez-Moctezuma, Gabriel Gabriel Lopez-Moctezuma California Institute of Technology Montero, Sergio Sergio Montero https://orcid.org/0000-0003-4242-3362 University of Rochester Harvard Dataverse 2021 Social Sciences Electoral coalitions Entrenched incumbency Dynamic electoral competition Regression discontinuity design Structural estimation Montero, Sergio Sergio Montero Frey, Anderson Anderson Frey University of Rochester Lopez-Moctezuma, Gabriel Gabriel Lopez-Moctezuma California Institute of Technology Montero, Sergio Sergio Montero University of Rochester 2021-06-10 2021-10-08 2021-10-08 5050 73454 10981652 1900 1757 75 19764 1978 4440 4106962 5280 2237 8662 2237 1097 4712 1287 87976 1900 189 21 38106 4712 252146654 10367 11760 521964592 10259 8597 1900 8494 630 3845733 1335 21 1900 1097 4471 2754 21 21 64919 67950 2574934 21 36385 5252 59326 645 21 5106 1701 1900 251422304 3475 1097 521964592 521964592 1900 8674 630 33848 11303 6825197 1578 2237 285258 630 13901 4048 73246 7772 1694 1693 8597 8587 32645 32388 630 315178151 3583 52454 37351 3534 1282 1097 8494 32334 698 21 43428 13115 3459 2237 10371 34734 252535419 22068 69601 19375 8097 32415 2252 10305 1712 38410 2088235 39180 1097 21010 17909 1102270 464 84080 2299 3348 12566 2545 113005 10373 1126 2030 1097 6935 31436 32404 33192 521964592 5361 36194 53063944 4432 4931 30989 156785 2414772 108671138 32246 4218048 63364 56306 21 4471 15669835 31350 77683 54229 3192 3476 64659 46798934 5391 9417928 521964520 356 2527 31406 1756 73413 8510 2306168 140475 8399 text/x-matlab image/png application/shp text/x-matlab text/x-matlab application/octet-stream application/shx type/x-r-syntax text/x-matlab application/pdf type/x-r-syntax text/x-matlab application/gzip text/x-matlab text/x-matlab application/pdf text/plain image/png text/x-matlab application/matlab-mat application/octet-stream application/pdf text/x-matlab application/x-rlang-transport application/matlab-mat type/x-r-syntax application/matlab-mat application/matlab-mat text/x-matlab text/x-matlab text/x-matlab text/x-matlab text/tab-separated-values text/x-matlab application/octet-stream text/x-matlab text/x-matlab text/x-matlab application/dbf application/octet-stream application/octet-stream image/png image/png application/pdf application/octet-stream application/pdf application/pdf image/png text/x-matlab application/octet-stream type/x-r-syntax text/x-matlab text/x-matlab application/x-rlang-transport text/x-matlab text/x-matlab application/matlab-mat application/matlab-mat text/x-matlab text/x-matlab text/x-matlab application/matlab-mat type/x-r-syntax text/tab-separated-values text/plain text/x-matlab application/dbf text/x-matlab application/matlab-mat type/x-r-syntax image/png text/x-matlab text/x-matlab text/x-matlab text/x-matlab application/gzip image/png application/matlab-mat text/x-matlab application/x-rlang-transport text/x-matlab image/png application/pdf text/x-matlab text/x-matlab text/x-matlab text/x-matlab application/matlab-mat text/x-matlab application/octet-stream image/png text/plain text/x-matlab text/x-matlab application/matlab-mat application/matlab-mat application/x-rlang-transport type/x-r-syntax text/tab-separated-values type/x-r-syntax application/pdf application/matlab-mat application/matlab-mat application/matlab-mat text/x-matlab application/pdf text/tab-separated-values application/pdf text/x-matlab image/png text/plain application/pdf text/plain image/png text/x-matlab text/x-matlab text/x-matlab text/x-matlab image/png application/matlab-mat application/matlab-mat text/plain text/x-matlab text/x-matlab application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/pdf application/pdf application/shp text/x-matlab type/x-r-syntax type/x-r-syntax image/png application/pdf text/tab-separated-values application/matlab-mat application/matlab-mat image/png image/png application/octet-stream text/x-matlab application/matlab-mat application/matlab-mat image/png image/png application/matlab-mat text/x-matlab image/png application/x-rlang-transport text/x-matlab application/matlab-mat application/matlab-mat application/shx text/x-matlab application/matlab-mat text/x-matlab image/png text/x-matlab application/matlab-mat application/pdf text/plain 1.1 Custom terms specific to this dataset Electoral coalitions between ideologically incompatible parties---among other unconventional electoral strategies---may seem to threaten effective representation, signaling a breakdown of programmatic politics. However, this perspective overlooks parties&apos; and voters&apos; dynamic considerations. We propose and estimate a model of dynamic electoral competition in which a short-term ideology compromise, via an electoral coalition, offers opposition parties (and voters) the opportunity to remove an entrenched incumbent party from office, thus leveling the playing field in the future. This tradeoff provides a previously unrecognized rationale for coalition formation in elections. We take our model to data from Mexican municipal elections between 1995-2016 and show that coalitions between parties on opposite ends of the ideology spectrum have served as an instrument of democratic consolidation. This dataset underwent an independent verification process that replicated the tables and figures in the primary article. For the supplementary materials, verification was performed solely for the successful execution of code. The verification process was carried out by the Odum Institute for Research in Social Science at the University of North Carolina at Chapel Hill. <br></br> The associated article has been awarded Open Materials and Open Data Badges. Learn more about the Open Practice Badges from the <a href="https://osf.io/tvyxz/wiki/home/" target="_blank">Center for Open Science</a>.<br></br> <img src="https://odum.unc.edu/files/2020/03/OpenData_PR-1.png" alt="Open Data Badge" height="77" width="80"> <img src="https://odum.unc.edu/files/2020/03/OpenMaterials_PR-1.png" alt="Open Materials Badge" height="77" width="80">