Social security in a general equilibrium model with endogenous government behavior / E. Drissen and F. van Winden -- The marginal cost of public funds with an aging population / D.E. Wildasin -- Optimal pension funding with demographic instability and endogenous returns on investment / D. Blanchet and D. Kessler -- Pay-as-you-go social security in a changing environment / R. Boadway, M. Marchand and P. Pestieau -- Public pensions in transition / W. Peters -- Ageing and the labor market / K.F. Zimmermann -- Tax reform, population ageing and the changing labour supply behaviour of married women / P. Apps -- United States public policy and the elderly / R.V. Burkhausuer and G.J. Duncan -- Life cycle savings and consumption constraints / A. Borsch-Supan and K. Stahl