. The Nam-Powers-Boyd (NPB) occupational scale was developed in the 1960's and the first set of scores was for the year 1950. Calculation of such scores was repeated for each subsequent decennial year through 2000 (see Past Scores). Because the requisite data were not included in 2010 Census, we prepared the latest set of scores for the three-year average of 2010-2012 based on the 2010-2012 American Community Survey, available from the Integrated Public Use Microdata Series, Minnesota Population Center, University of Minnesota.
A number of different occupational classifications exist in the IPUMS holdings for censuses and for the American Community Survey. Consistent with past practices, we first developed the NPB scale using the OCC classification. A fuller explanation of the latest Nam-Powers-Boyd scale is given in the paper below, which was presented at the 2015 meeting of the Southern Demographic Association. (Click on link.)
The associated NPB occupational scores are presented in Excel form below. (Click on link.)
Later, IPUMS released a classification called OCC2010 which aggregates some occupational titles to create a harmonized occupational classification (OCC 2010) for censuses from 1950 and for the ACS. We also created Nam-Powers-Boyd scores for this second classification of occupations, the OCC2010 classification, again using data from the 2010-2012 ACS. It should be noted that OCC2010 has fewer occupational titles than OCC. A brief description and the resulting scores for 2010-2012, keyed to the harmonized occupational classification, are found in the two files below.
Users, therefore, have the choice of using NPB scores derived from the OCC classification or using NPB scores derived from the OCC2010. For most occupational titles, the scores are the same. Where there are differences, they are small.