Data file documentation (NCES 2010-330) describes the Barron's Admissions Selector for 1972, 1982, 1992, 2004, and 2008 (in NCES 2010-331) and the procedure followed in assigning HEGIS FICE and IPEDS UNITID codes to the institutions listed in Barron's. This documentation also provides example SAS programs for merging the NCES−Barron's Competitive Index Data files with NLS-72, HS&B, NELS:88, ELS-2002 and BPS longitudinal studies as well as a number of issues to assist the researcher. This data documentation accompanies the NCES−Barron's Admissions Competitiveness Index Data Files (NCES 2010-331).