Political Advertising on Google: .To help everyone understand the ads they see online, this report from Google includes information about verified advertisers’ spending on ads related to elections.
Congressional District Data: .The data set includes a wide range of economic, social and geographic information for every U.S. congressional district, from 1943-1998.
Harvard Election Data Archive: .This archive contains data on election results, voting behavior, and electoral politics, with particular focus on the United States.
Voting Technology Project Data: .seeks to develop better voting technologies, to improve election administration, and to deepen scientific research in these areas
Global Elections Database: .Information on the results of both national and subnational elections around the world.
Birth Order and Voter TurnoutBernt Bratsberg; Christopher T. Dawes; Andreas Kotsadam; Karl-Oskar Lindgren; Richard Öhrvall; Sven Oskarsson; Oddbjørn Raaum (2022)