Noriyuki Takayama, Tokyo) Takayama, Noriyuki (Professor, Institute of Economic Research, Hitotsubashi University, Olivia S. Mitchell, John Piggott, Olivia S. Mitchell, John Piggott, University of Pennsylvania) Mitchell, Olivia S. (Executive Director of the Pension Research Council, Wharton School, University of New South Wales) Piggott, John (Professor of Economics, Australian School of Business