Each redistricting dataset merges the electoral data the SWDB collected and processed over the preceding decade with the most current census data (PL94-171). The result is a census block level dataset that allows for longitudinal analysis of electoral data over time on the same unit of analysis. Electoral data consist of the Statements of Vote (SOV) and Statements of Registration (SOR) for each statewide election. These data are collected from the Registrars of Voters for each of the 58 California counties with each election.
The SWDB collects the Statement of Vote and the Statement of Registration along with various geography files from each of the 58 counties for every statewide election. The Statement of Vote is a precinct level dataset and precincts in California change frequently between elections. The goal of the SWDB is to make election data available that can be compared over time, on the same unit of analysis – a precinct, a census block or a census tract.
The Statewide Database's Statement of Registration (SOR) i.e. REG, ABS, POLL VOTE, and VOTE files contain registration data that are broken down by ethnicity. These data are derived from matching surnames on voter registration cards to an ethnic surname list.
Asian surname matching - a paper containg information detailing the development of an asian surname matching list. (pdf)
Methodology - a few words of caution (doc)
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