Source: "Machine_Readable_URL_PUF.xlsx" workbook "PY2018 MR-PUF" sheet
Source File URL: https://www.cms.gov/CCIIO/Resources/Data-Resources/marketplace-puf.html
Source Page: http://download.cms.gov/marketplace-puf/2018/machine-readable-url-puf.zip
NBER URL: http://www.nber.org/data/cms-health-insurance-marketplace-public-use-files.html
machread2018 data set up by Jean Roth , jroth@nber.org ,  8 Dec 2017