00351nam a2200097Ia 4500008004100000082002100041100002000062245008300082260007900165300000900244260811b        |||||||| |||| 00| 0 eng d  a658.32bSp844.CS  aSpence, Michael  aCompetition in salaries, credentials, and signalling prerequisites for jobsb/  aStanford:bnstitute for Mathematical Studies in the Social Sciences,c1974  a36p.