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Briefing
Why Do Couples and Singles Save During Retirement?
While the savings of retired singles tend to fall with age, those of retired couples tend to rise. We estimate a rich model of retired singles and couples with bequest motives and uncertain longevity and medical expenses. Our estimates imply that while medical expenses are an important driver of the savings of middle-income singles, bequest motives matter for couples and high-income singles and generate transfers to nonspousal heirs whenever a household member dies. The interaction of medical expenses and bequest motives is a crucial determinant of savings for all retirees. Hence, to ...
Working Paper
Time-Consistent Individuals, Time-Inconsistent Households
I present a model of consumption and savings for a multi-person household in which members are imperfectly altruistic, derive utility from both private and shared public goods, and share wealth. I show that, despite having standard exponential time preferences, the household is time-inconsistent: members save too little and overspend on private consumption goods. The household remains time-inconsistent even when members save separately, because the possibility of voluntary transfers or joint contribution to the public good preserves the dynamic commons problem. The household will choose to ...
Working Paper
Why Do Households Save and Work?
This paper quantifies why households save and work using a life-cycle model that incorporates wage risk, endogenous labor supply of both spouses, marital transitions, health, medical expenses, mortality, and bequest motives at the death of the first and last household member. We estimate it using PSID and HRS data and conduct counterfactuals to assess the quantitative role of individual mechanisms. Precautionary saving against wage risk is smaller than in models that abstract from labor supply and within-household insurance. Bequest motives and medical expenses remain important drivers of ...
Working Paper
Do the Rich Really Save More? Answering an Old Question Using the SCF with Direct Measures of Lifetime Earnings and an Expanded Wealth Concept
The question of whether affluent households save at a higher rate has been asked by economists on numerous occasions since the 1950s. It is standard in this research to identify affluent, or “rich,” households as those with high lifetime earnings or income to better ground the empirical question in relevant theory. Existing results in the literature, however, are mixed on whether rich households in fact save more than others, with some suggesting a generally flat savings profile across the distribution and others supporting the notion that the rich do indeed save more. Many of the ...
Working Paper
Robust permanent income in general equilibrium
This paper provides a tractable continuous-time constant-absolute-risk averse (CARA)-Gaussian framework to quantitatively explore how the preference for robustness (RB) affects the interest rate, the dynamics of consumption and income, and the welfare costs of model uncertainty in general equilibrium. We show that RB significantly reduces the equilibrium interest rate, and reduces the relative volatility of consumption growth to income growth when the income process is stationary. Furthermore, we find that the welfare costs of model uncertainty are nontrivial for plausibly estimated income ...
Working Paper
Wealth in the Utility Function and Consumption Inequality
Wealth in the utility function (WIU) has been increasingly used in macroeconomic modelsand this specification can be justified by a few theories such as Max Weber’s (1904-05, German; 1958) theory on “spirit of capitalism.” We incorporate the WIU into a general equilibriumconsumption-portfolio choice model to study the implications of the WIU for consumption inequality, equilibrium interest rate, and equity premium—an unexplored area in the literature.Our general equilibrium framework features recursive exponential utility, uninsurable labor risks,and multiple assets and can deliver ...
Working Paper
Interactions between job search and housing decisions: a structural estimation
In this paper, we investigate to what extent shocks in housing and financial markets account for wage and employment variations in a frictional labor market. To explain these interactions, we use a model of job search with accumulation of wealth as liquid funds and residential real estate, in which house prices are randomly persistent. First, we show that reservation wages and unemployment are increasing in total wealth. And, second, we show that reservation wages and unemployment are also responsive to the composition of wealth. Specifically, when house prices are expected to rise, holding a ...
Working Paper
Optimal Paternalistic Savings Policies
We study optimal savings policies when there is a dual concern about undersaving for retirement and income inequality. Agents differ in present bias and earnings ability, both unobservable to a planner with paternalistic and redistributive motives. We characterize the solution to this two-dimensional screening problem and provide a decentralization using realistic policy instruments: mandatory savings at low incomes but a choice between subsidized savings vehicles at high incomes?resembling Social Security, 401(k), and IRA accounts in the US. Offering more savings choice at higher incomes ...
Discussion Paper
Piggy Banks
What do banks do? Ask an economist and you’ll get a variety of answers. Banks play a vital role in allocating capital by linking savers and borrowers; they produce information by screening and monitoring borrowers; they create liquidity; they share and distribute risk; they engage in maturity transformation by borrowing short and lending long. What you won’t usually hear is that banks may help people stick to an optimal savings plan that they might not be able to stick to if they invested their money themselves. In other words, banks may serve as piggy banks by preventing people from ...