Merged at MCD Group level.
There are three electoral precincts in the 1990 dataset of the form A-B where A and B have different MCDGRPs. MCDGRP -A gets the electoral information and MCDGRP -B ges nothing which often results in no voting data for that group. The MCDGRP pairs involved are:
SURPLUS DEFICIT 453 430 932 928 1695 1696
They are all marked as questionable for this year, 1990.
There are 15 other MCDGRPs have no electoral precinct matches for 1990, these are simply empty and are marked as questionable for that year. There are 16 in 1988, 19 in 1986 and 29 in 1984.
There exist CENSPREC pairs of the form "ANAME", "ANAME TWP." and corresponding electoral precinct pairs of the form "ANAME CITY", "ANAMETWP". Where the two CENSPRECs were in different MCDGRPs.
In such cases the CENSPREC "ANAME" was matched to "ANAME CITY" electoral precinct, and CENSPREC "ANAME TWP." was matched to "ANAME TWP." electoral precinct.
This follows the pattern in other pairs where the word "CITY" is not missing in the CENSPREC label, and follows the pattern in other years where the "CITY" label is missing from the electoral precinct label. These pairs are found in MCDGRPs: [(481,482), (1165,1166), (1169,1170), (1695,1696), (2205,2206), (2428,2429), (2439,2440), (2442,2443)].
The computer had initially matched CENSPREC "ANAME" to "ANAME TWP." electoral precinct, and had provided no match to CENSPREC "ANAME TWP." or "ANAME CITY" electoral precinct.
There are 15 other MCDGRPs with no matching electoral precincts in the 1990 data. These are simply empty. There are 16 in 1988, 19 in 1986 and ** in 1984.
For MATH90MN.XLS only: Eleven unmatched electoral precincts had a name followed by a slash followed by "UNORG" and sometimes a number. (e.g. "AULT/UNORG 54-13" or "COLVIN/UNORG COMB"). Although many CENSPREC are named "UNORG" followed by a number, none of these numbers matched the unmatched electoral precinct, they were matched according to the name before the slash. (e.g. AULT or COLVIN). For one of these eleven, "LEIDING/UNORG 66-19," there was a CENSPREC named UT 66-19, but not UNORG 66-19, so I stuck with the above decision rule.
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