The earnings tests and work patterns in four nations : an analysis of why work activity among older men does not increase when the earnings test is removed or liberalized /

Prepared for Social Security Administration, Comparative Studies Staff, Office of International Policy; prepared under grant no. 98083, Department of Health and Human Services, Social Security Administration.

Christian teaching on social and economic questions confronting older boys and young men,

"References for the different studies": p. 3-7.