Merged at state level.
Alaska does not have typical county names on the Census side. The data were thoroughly checked to verify that the correct SUMLEV was extracted from the PL94-171 data, and it was (SUMLEV=050 for the county level). The Census numbering scheme is unusual (e.g., 013, 016, 020, 050, 060, etc.), unlike the typical odd number approach. Moreover, the Census "counties" are labeled ``Borough'' or "Census Area", *not* "County."
On the other side, the county abbreviations used in the electoral data have few matches to the text strings for the "county" variable on the Census side. And electoral county numbers do not follow the same sequence (i.e., 401, 402, 403,...).
Even the population counts on the Census side have very little corollary on the electoral side (using the electoral data total registered voters variable, G90R).
Finally, the number of county units is not the same on either side, with 27 on the electoral end and 25 from the Census.
Therefore, this state could not even be merged at the county level.
The potential county matches I are listed below, using the electoral CY variable and the Census CNTY variable.
CY CNTY 401 130 402 403 404 110 405 122 406 407 408 409 410 411 412 413 414 415 416 170 417 418 240 419 201 (too many on electoral side) 420 090 (too few on electoral side) 421 016 422 185 423 424 425 426 060 (too many on electoral side) 427 150
This list leaves out 14 more Census counties which are unmatched.
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