Boundary information about census blocks, precincts, and districts can be critically valuable for research in a range of social science disciplines, including economics, political science, and finance. Recent research in household finance, for example, has used such data to investigate how foreclosures affect neighborhoods. In most countries, the boundary coordinates of geographical regions, such as voting precincts, are readily available for all to use. In many U.S. states, however, such information is astonishingly difficult to collect. This grant supports an initiative by Michael McDonald, one of the nationХs foremost experts on fine-grained political geography, to collect detailed data on the geospatial boundaries of U.S. electoral precincts and districts, to make that data available to researchers and the public, and to develop open, easy-to-use software that will facilitate the use and analysis of this data by researchers.