The shift from defined benefit to defined contribution plans in the United States has drawn new attention to the effect of participants' asset allocation decisions on their financial resources for retirement. This paper develops a stochastic simulation algorithm to evaluate the effect of holding...

We develop a model to study optimal decision making in the face of uncertainty about the timing and structure of a future event. The model is used to study optimal decision making and welfare when individuals face uncertainty about when and how Social Security will be reformed. When individuals...

Why do people save? A strand of the literature has emphasized the role of 'precautionary' motives; i.e., private agents save in order to mitigate unexpected future income shocks. An implication is that in countries faced with more macroeconomic volatility and risk, private saving should be...

Despite facing significant uncertainty about their lifespans and health care costs, most retirees do not buy annuities or long-term care insurance. In this paper, I find that retirees' saving and insurance choices are highly inconsistent with standard life cycle models in which people care only...

Using a variance decomposition of shocks to GDP, we quantify the role of international factor income, international transfers, and saving in achieving risk sharing during the recent European crisis. We focus on the sub-periods 1990-2007, 2008-2009, and 2010 and consider separately the European...

This paper studies Pareto-optimal risk-sharing arrangements in a private information economy with aggregate uncertainty and ex ante heterogeneous agents. I show how to implement Pareto-optima as equilibria when agents can trade claims to consumption contingent on aggregate shocks in financial...

We estimate channels of international risk sharing between European Monetary Union (EMU), European Union, and other OECD countries 1992-2007. We focus on risk sharing through savings, factor income flows, and capital gains. Risk sharing through factor income and capital gains was close to zero...

China's household saving rate has increased markedly since the mid-1990s and the age-savings profile has become U-shaped during the 2000s. We find that rising income uncertainty and pension reforms help explain both of these phenomena. Using a panel of Chinese households covering the period...

In 1997 Chancellor Kohl proposed a major pension reform and pushed the law through Parliament explaining that the German PAYG system had become unsustainable. One limitation of the new law -- one that is crucial for our identification strategy -- is that it left the generous pension entitlements...

In the presence of overlapping generations, markets are incomplete because it is impossible to engage in risksharing trades with the unborn. In such an environment the government can use a social security system, with contingent taxes and benefits, to improve risksharing across generations. An...