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All findings, interpretations, and conclusions of this paper represent the views of the author(s) and not those of the Wharton School or the Pension Research Council. © 2000 Pension Research Council of the Wharton School of the University of Pennsylvania. All rights reserved.
The authors thank Benjamin Bridges, Olivia Mitchell, Jan Olson, Herbert Reff, and Chuck Slusher for helpful comments and/or data support. In addition they acknowledge Bernie Wixon and Denny Vaughan for their support.
Date Posted: 26 February 2020