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Match Rules

 

  1. Look for spelling variants or typos, especially when no other precinct name is remotely close. The people who typed these things in were not perfect. Also, slight punctuation differences are common. For example, 'JONES' BRIDGE' matches 'JONESBRIDGE', 'WARREN' matches 'WAREN', and so forth.
  2. Abbreviations and slightly different wordings are common. For example, 'SMITH FIRE STA.' matches 'SMITH FIRE STATION', 'JEFFERSON ELEM. SCH.' goes with 'JEFF. ELEMENTARY SCHOOL', 'BURGESS REC. CTR.' with 'BURGESS RECREATION CENTER,' etc.
  3. Often two or more precincts will exist with only one corollary on the other side, e.g., 'PCT 17-A' and 'PCT 17-B' compared to 'PRECINCT 17'. The typical solution is to assume that both of the variants on the one side are geographical components of the single precinct on the other, so that they should both get the same MCDGRP. When you make this assumption, make sure that there are no other slight differences in the text names that would indicate that the assumption is invalid, such as if one of the precincts '17' is for a city ward in the county and the other is for a rural ward in the county.
  4. If an entire family of precinct names, e.g., 17-A through 17-X, has the same MCDGRP, and most of them have unique corollaries on the other side, but one or a few do not, then to those missing corollaries you can assign the same MCDGRP that all the others have. Do not do this if the family has different MCDGRP values, though!
  5.   Remember, you can leave precincts blank! We don't want to do this if we can avoid it, but if the match is simply not possible, or if a candidate is truly suspect, then skip it and move on. Just don't do this too often in a single county, or you will threaten its MCD Group-ing (see the exceptions section below).
  6. Sometimes a given precinct record, either on the Census or PLVD sides, will contain names for actual precincts that are obviously different: e.g., 'PRECINCTS 15, 16, & 18'. On the other side you may see three different rows, e.g., 'PREC 15', 'PREC 16', and 'PREC 18'. You can confidently make this match.
  7. Sometimes acronyms are used, e.g., a 'MOAPA' series on one side becomes 'MOA' on the other, or 'NORTH LAS VEGAS' becomes 'NLV'. Go ahead and make the appropriate matches based on obvious acronyms, as long as they are unique, i.e., there is no other name that would produce the same acronym by the prevailing acronym-creation scheme in that county. If they are not unique, then you will have to skip these kinds of precincts.
  8. Unfortunately, a new problem crops up with every state. Be flexible, record the problem, your options, and your decision, and move on, keeping in mind Rule Number 5 above!

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Next: Identifying Exceptions Up: Hand-Matching: The Correspondence between Previous: Some Basic Facts to
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