Requested Data
IRS Form 1040 External Commingled File
BOC PIK Crosswalk Current Population Survey-ASEC (CPS)
BOC Consolidated PIK Crosswalk Current Population Survey (CPS)
SSA Detailed Earnings Record (DER) CPS Extract
Current Population Survey (CPS) March Supplement or CPS Annual Social and Economic Supplements (ASEC)
BOC Crosswalk 1940 IPUMS Research
1940 IPUMS Research
Census IPUMS Research
SSA Summary Earnings Record (SER) CPS Extract
