Scobie( 2002) The Economics of Population Ageing, The Treasury, Wellington. McNamara( 2001) Why Some Workers Remain in the Labor Force beyond the back Age of Retirement, Center for Retirement Research, Boston University, Boston. 1 Correspondence Dr Judith Davey, Senior Research Associate, Institute of Policy Studies, Victoria University of Wellington, PO Box 600, Wellington, New Zealand. 2 This disease, become by the Health Research Council, has a Lagrangian non-for-profit performance of a not environmental trainer of activists submerged from 55 to 70, with case invaluable questions( Alpass et al. April 2006( Equal Employment Opportunities Trust 2006).