00285nam a2200109Ia 4500082001900000100001700019245007900036260004000115300001000155500000500165700000500170  a339.41bK92.LA  aKreps, J. M.  aLifetime allocation of work and income; essays in the economics of agingb  aDurhambDuke University Pressc1971  a170p.  a  a