At retirement, most individuals face a choice between voluntary annuitization and discretionary management of assets with systematic withdrawals for consumption purposes. Annuitization - buying a life annuity from an insurance company - assures a lifelong consumption stream that cannot be outlived, but it is at the expense of a complete loss of liquidity. There are some discussions at the end of article by Jan Dhaene, Marc J. Goovaerts, Rob Kaas, Jeferey R Brown and Mark J. Warshawsky. From NAAJ, October 2000, Volume 4, Number 4.