2 IZA Discussion Papers
IZA Discussion Paper No. 13755
published in: Canadian Journal of Economics, 2020, 53, 1365-1403. .
IZA Discussion Paper No. 8743
substantially revised version published in: Piggott, J. and A. Woodland (Eds.), Handbook of the Economics of Population Aging, Elsevier, North Holland, 2016, Vol. 1A, Ch. 3, 119-177.