David, Paul A.; Hall, Bronwyn H. - Department of Economics, Stanford University
Revised: March 24, 1999 <p> The original draft of this paper was presented to the American Economic Association Meetings session "In Honor of Edwin Mansfield," held in New York, N.Y., on January 5, 1999. <p> This paper is a first step toward closing the analytical gap in the extensive literature on...</p></p>
