The Cooperative Institutional Research Program (CIRP)
is a national longitudinal study of the American higher education system. Established in 1966 at the American Council on Education, the CIRP is now administered by the Higher Education Research Institute under the direction of John H. Pryor. The CIRP is the nation's largest and oldest empirical study of higher education, involving data on some 1,800 institutions and over 11 million students. It is regarded as the most comprehensive source of information on college students. The annual report of the CIRP Freshman Survey provides normative data on each year's entering college students.