NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Natalie J. Yang

The University of Chicago
Booth School of Business
5807 S Woodlawn Ave.
Chicago, IL 60637
USA

E-Mail: EmailAddress: hidden: you can email any NBER-related person as first underscore last at nber dot org
Institutional Affiliation: Columbia University

NBER Working Papers and Publications

January 2020Imputing Missing Values in the US Census Bureau's County Business Patterns
with Fabian Eckert, Teresa C. Fort, Peter K. Schott: w26632
The County Business Patterns data published by the US Census Bureau track employment by county and industry from 1946 to the present. Two features of the data limit their usefulness to researchers in practice: (1) employment for the majority of county-industry cells is suppressed to protect confidentiality, and (2) industry classifications change over time. We address both issues. First, we develop a linear programming method that exploits the large set of adding-up constraints implicit in the hierarchical arrangement of the data to impute missing employment. Second, we provide concordances to map all data to a consistent set of industry codes.
 
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