Comment on Kotlikoff, Shoven, and Spivak

In the absence of perfect annuity markets, individual consumers generally undertake precautionary saving to provide resources for their future consumption in the event that they live longer than expected. Kotlikoff, Shoven, and Spivak (in this issue) (hereafter KSS) have provided us with a well-conceived and well-executed study of the effects of various annuity arrangements on individual and aggregate saving in the presence of lifetime uncertainty. Each of these authors has had a long-standing interest in this area, and their current paper reflects their accumulated expertise. Their results indicate that a potentially sizable fraction of U.S. household wealth represents precautionary saving resulting from the absence of perfect annuity market.