These data decompose representative-specific PAC contributions (from the U.S. House of Representatives) across issues and also decompose issue-specific PAC lobbying expenditures across representatives. This is done for i) all PACs, ii) only business PACs and iii) only labor PACs. For a detailed explanation of how these data were created, see Section 3 and the supplementary material of Revisiting the link between PAC contributions and lobbying expenditures.
IPUMS Census microdata uses the industry classification variable ind1990. The following files contain a concordance between ind1990 and 4-digit SIC87 codes in PDF, excel and STATA formats.