Manfred Häfner, Giacomo Luciani
Jennie Skulander
Dirk Bergemann, Alessandro Bonatti, Tan Gan
Stephen D. Williamson, Randall Wright
George Jakubson, Orley Ashenfelter, Richard Layard
Martin Chalkley, Louis Phlips
John Corina
Barry R. Chiswick
Warren Kurt Bickel, Leonard Green, Rudy E. Vuchinich et al.
Joshua D. Wright, Douglas H. Ginsburg
Clive L. Spash
Franklin M. Fisher
