This paper was an accidental re-issue of w2412
Download Citation Data
Review of Economic Studies, April 1989, vol 56(2), no. 186 pp. 179-198 citation courtesy of
In addition to working papers, the NBER disseminates affiliates’ latest findings through a range of free periodicals — the NBER Reporter, the NBER Digest, the Bulletin on Retirement and Disability, and the Bulletin on Health — as well as online conference reports, video lectures, and interviews.