A growing literature explores reasons for rising wealth inequality, but disregards the role of pension systems despite their well-understood infiuence on life-cycle saving. In theory and according to available evidence, both pay-as-you-go (PAYG) and fully-funded (FF) pension schemes crowd out...

This paper revisits the role played by myopia in generating a theoreticalrationale for pay-as-you-go social security in dynamically efficient economies.Contrary to received wisdom, if the real interest rate is exogenously fixed, enough myopiamay justify public pensions but never alongside...

The welfare state is not merely a stand-in for missing markets; it can do a whole lot more. When generations overlap and the young must borrow to make educational investments, a dynamically-efficient welfare state, by taxing the middle-aged and offering a compensatory old-age pension, can...

Many countries, in an effort to address the problem that too many retirees have too little saved up, impose mandatory contributions into retirement accounts, that too, in an age-independent manner. This is puzzling because such funded pension schemes effectively mandate the young, who wish to...

Time-inconsistent, present-biased agents may hold commitment assets hoping to keep their current and future present bias in check. Paternalistic governments, in an effort to help such people, routinely offer commitment machinery such as restrictions (or bans) on early withdrawals from...

In the real world, public pay-as-you-go pension (PAYG) schemes are popular and co-exist with private, retirement-saving schemes. This is true even in dynamically efficient economies where such pensions offer a lower return. The classic Aaron-Samuelson result argues that, in theory, this is...

We describe a “business as usual” (BAU) economy in which pollution is a by-product of productive activity by the current generation but “damages” production for future generations. Over time, conditions in the BAU economy become dire: it gets increasingly polluted, consumption falls and...

In this paper we assume away standard distributional and staticefficiency arguments for public health and instead seek a dynamic efficiency rationale. We study a lifecycle model wherein young agents make health investments to reduce mortality risk. We identify a welfare rationale for public...

The welfare state is not merely a stand-in for missing markets; it can do a whole lot more. When generations overlap and the young must borrow to make educational investments, a dynamically-efficient welfare state, by taxing the middle-aged and offering a compensatory old-age pension, can...