If the precinct level data shows 0 registration and positive turnout, suspect this as the cause. Matching Precincts to MCDgroups . Great care was taken to match precincts to MCDgroups, and the process is explained in detail in the full documentation. Still, some precincts could not be matched, or were questionable. All exceptions are detailed in the codebook and the individual exceptions files.
Ad indicia spectate.
Hence, California is an exceptional state, the variables are somewhat different, and the aggregation level is finer than other states. We were able to incorporate data only from '92, however IGS has data for other years as well. Contact Micah Altman .