Overconfidence and consumption over the life cycle

Overconfidence is a widely documented phenomenon. In this paper, we study the implications of consumer overconfidence in a life-cycle consumption/saving model. Our main analytical result is a necessary and sufficient condition under which any degree of overconfidence concerning the mean return on savings can produce a hump in the work-life consumption profile. This condition is almost always met in the data. We show by simulations that overconfidence concerning the variance of the return can have little effect on the long-run average behavior of consumption over the life cycle, and that our basic conclusion is fairly robust with various realistic modifications to the baseline model. We interpret the general applicability of our analytical framework and discuss our numerical results in the light of aggregate consumption data.     

CONSUMPTION AND TIME USE OVER THE LIFE CYCLE

We incorporate home production in a dynamic general equilibrium model of consumption and savings with illiquid housing and a collateralized borrowing constraint. The calibrated model explains life‐cycle patterns of households' time use and consumption of different categories documented from the microdata. It predicts that the interaction of the labor efficiency profile and the home production technology explains households' time use. The resulting income profiles, the endogenous borrowing constraint, and home production account for the initial hump in consumption. The complementarity of home hours, home input, and housing in home production drives the consumption profiles later in the life cycle.     

Heterogeneity in the Relationship between Happiness and Age: Evidence from the German Socio‐Economic Panel

This paper studies the evolution of life satisfaction over the life course in Germany. It clarifies the causal interpretation of the econometric model by discussing the choice of control variables and the underidentification between age, cohort and time effects. The empirical part analyzes the distribution of life satisfaction over the life course at the aggregated, subgroup and individual level. To the findings: On average, life satisfaction is mildly decreasing up to age 55 followed by a hump shape with a maximum at 70. The analysis at the lower levels suggests that people differ in their life satisfaction trends, whereas the hump shape after age 55 is robust. No important differences between men and women are found. In contrast, education groups differ in their trends: highly educated people become happier over the life cycle, where life satisfaction decreases for less‐educated people.     

THE DECLINE OF JAPAN'S SAVING RATE AND DEMOGRAPHIC EFFECTS*

This paper investigates the phenomenon in which Japan's household saving rate showed a sharp decline even during the long stagnation period called “the lost decade.” Our empirical results show that the sharp decline in the saving rate in the 1990s can be explained by the significant impact of demographic factors. Furthermore, the estimated life cycle curve is hump shaped, meaning that the prediction of the life cycle model is confirmed with time series data on the Japanese saving rate.     

HOUSE PRICES AND CONSUMPTION INEQUALITY

I characterize how house price shocks affect consumption inequality using a life cycle model of housing and nonhousing consumption with incomplete markets. I derive analytical expressions for the dynamics of inequalities and use these to analyze large house prices swings seen in the United Kingdom. I show that movements in consumption inequality were large, that they correspond with the theoretical predictions qualitatively, and that the model explains a large fraction of the movements quantitatively. I demonstrate the accuracy of this analysis using an extended model's full nonlinear solution. Finally, accounting for house price shocks alters estimates of labor–income risks using cross‐sectional data.     

Neoclassical life-cycle consumption: a textbook example

Summary.   We present a simple neoclassical life-cycle model in continuous time, in which the effects of endogenous labor supply, uncertain lifetime, and family composition on consumption and income profiles are jointly analyzed. Due to a parsimonious specification, analytical solutions for consumption growth are available for constant intertemporal elasticity of substitution preferences. Without relying on borrowing constraints, the model can generate a hump in the consumption profile, and a comovement of consumption and income during working life. Received: June 9, 1999; revised version: October 4, 1999     

Optimal Retirement with Increasing Longevity

We develop an optimizing life‐cycle model of retirement with perfect capital markets. We show that longer healthy life expectancy usually leads to later retirement, but with an elasticity less than unity. We calibrate our model using data from the US and find that, over the last century, the effect of rising incomes, which promote early retirement, has dominated the effect of rising lifespans. Our model predicts continuing declines in the optimal retirement age, despite rising life expectancy, provided the rate of real wage growth remains as high as in the last century.     

Useful Government Spending and Macroeconomic (In)stability under Balanced-Budget Rules

It has been shown that an otherwise standard one‐sector real business cycle model may exhibit indeterminacy and sunspots under a balanced‐budget rule that consists of fixed and “wasteful” government spending and proportional income taxation. However, the economy always displays saddle‐path stability and equilibrium uniqueness if the government finances endogenous public expenditures with a constant income tax rate. In this paper, we allow for productive or utility‐generating government purchases in either of these specifications. It turns out that the previous indeterminacy results remain unchanged by the inclusion of useful government spending. By contrast, the earlier determinacy results are overturned when public expenditures generate sufficiently strong production or consumption externalities. Our analysis thus illustrates that a balanced‐budget policy recommendation which limits the government's ability to change tax rates does not necessarily stabilize the economy against belief‐driven business cycle fluctuations.     

Limited asset market participation and the consumption‐real exchange rate anomaly

Abstract Under efficient consumption risk sharing, as assumed in standard international business cycle models, a country's aggregate consumption rises relative to foreign consumption, when the country's real exchange rate depreciates. Yet empirically, relative consumption and the real exchange rate are essentially uncorrelated. This paper shows that this ‘consumption‐real exchange rate anomaly’ can be explained by a simple model in which a subset of households trade in complete financial markets, while the remaining households lead hand‐to‐mouth (HTM) lives. HTM behaviour also generates greater volatility of the real exchange rate and of net exports, which likewise brings the model closer to the data.     

Trend productivity growth and the government spending multiplier

The paper analyzes the effects of government spending shocks under alternative rates of trend growth in a New-Keynesian model characterized by price and wage rigidity. We show that the presence of trend growth makes the impact on output and consumption of government spending shocks smaller but more persistent with a hump shaped impulse response. Our results imply that the impact government spending multiplier decreases while the cumulative multiplier increases with trend growth.     

Financial market participation and the developing country business cycle

I explore the implications of limited participation in financial markets on a standard small open economy business cycle model. Despite its parsimony, the limited participation model developed in this paper improves over the standard model in terms of explaining two important features of business cycle facts of developing countries: high volatility of consumption, and high negative correlation between the trade balance and output. Limited participation model is then used to inspect the effects of financial development and integration on macroeconomic volatility. Under a standard calibration, limited participation model leads to the conclusion that financial development and integration are associated with higher investment and output volatility. Effect of more participation on consumption volatility is dependent on the specification of the risk premium function.     

Why are some favourite-longshot biases positive and others negative?

Most studies of both pari-mutuel and fixed-odds betting markets have shown a systematic tendency for the expected return to bets at lower odds to exceed those at higher odds. Some work, however, has revealed in certain markets the absence or even reversal of this bias. We present a model which distinguishes two separate types of bettor, and use this to demonstrate how transactions costs, the extent of public information, and consumption benefits of betting can explain the disparities. Our empirical evidence, taken from a fixed-odds market, lends support to our theoretical conclusions.     

International Risk Sharing and Low Cross-Country Consumption Correlations: Are They Really Inconsistent?

In dynamic-equilibrium trade models, the common assumption that asset markets are complete implies that correlations of consumption across countries should be quite high. In contrast, measured consumption correlations tend to be rather low. While some suggest this implies that asset market incompleteness is a fundamental feature determining international trade dynamics, this paper provides an example of a simple model economy in which complete markets can be associated with consumption correlations that are lower than output correlations. Conditions for substitution elasticities associated with this result are derived for a two-country, two-good endowment model with heterogeneous agents.     

Macroeconomic Interdependence with Trade and Multinational Activities

This paper examines how differences in the integration strategies followed by firms active in foreign markets affect the way productivity and policy shocks spread their effects worldwide. The analysis incorporates costly trade and local sales by multinational firms in a general-equilibrium open economy macroeconomic model. The mode of foreign market access is found to play a major role in the international business cycle, affecting the dimension of consumption and output spillovers worldwide. We show that despite financial markets being effectively complete, consumption risks may not be fully insured in the world economy as long as multinational firms discriminate prices across markets. Furthermore, cross-country differences in firms' integration strategies can account for extensive asymmetries in the way country-specific and global shocks are transmitted in the world economy. We argue that this may have relevant consequences for the welfare implications of monetary and trade policies.     

PRICE SEARCH,CONSUMPTION INEQUALITY AND EXPENDITURE INEQUALITY OVER THE LIFE ‐CYCLE

We differentiate consumption from expenditure by incorporating price search decision into an otherwise standard life‐cycle model. We first analytically show that, under very general conditions, poorer households search more and pay lower prices compared to wealthier ones. As a result, consumption inequality is smaller than expenditure inequality, and the gap between them increases over the life‐cycle. Next, using a plausibly calibrated model, we find that life‐cycle increase in consumption inequality is about 30% lower than the increase in expenditure inequality. Price search provides an insurance mechanism against income shocks and increases the welfare of a newborn by 3.9%.     

Gender Differences in Time Use over the Life Course in France,Italy, Sweden,and the US

Abstract

This contribution analyzes how men and women in France, Italy, Sweden, and the United States use their time over the life cycle and the extent to which societal and institutional contexts influence the gender division of labor. In order to test the hypothesis that contextual factors play a crucial role in shaping time allocation, this study considers countries that diverge considerably in terms of welfare state regime, employment and paid working time systems, family policies, and social norms. Using national time-use surveys for the late 1990s and early 2000s and regression techniques, the study not only finds large gender discrepancies in time use in each country at all stages of life but also determines that institutional contexts, in particular the design of family policies and employment regimes, do shape gender roles in different ways, and that Sweden displays the lowest gender gap in time allocation across the life course.     

Self-insurance in a life-cycle model of labour supply and savings

This paper analyses the incentives to work and to save over the life cycle in the presence of incomplete markets. In a calibrated, partial equilibrium model, flexibility in hours worked changes asset age-profiles: borrowing when young is greater and saving when middle-aged is greater than when labour supply is fixed. Uncertainty causes individuals to work longer hours and to consume less when young. With flexibility over hours, accumulating precautionary assets incurs less of a utility cost and so the level of saving is greater. Further, allowing for flexibility and uncertainty means simulated hours of work and consumption more closely match the age profiles in the data.     

转型经济中农户储蓄行为:中国农村的实证研究

本文运用大样本农户家庭调查资料 ,对决定中国农户家庭储蓄行为的影响因素进行了探索 ,从实际出发构建了一个具有较好解释力 ,且能对各种类型的变量均有所考虑的储蓄模型。研究发现 :(a)流动性约束、预防性储蓄动机以及工业化等对储蓄率的上升贡献相当大 ,且为正值 ;(b)在解释区域间储蓄率的差异时 ,文化是一个相当重要的因素 ;(c)家庭生命周期的“∪”型分布假说被拒绝 ,相反的“∩”型分布被发现 ;(d)当家庭财富与储蓄率的相关关系表现为负时 ,持久收入假说也被拒绝。     

Risky Habits: on Risk Sharing,Habit Formation,and the Interpretation of International Consumption Correlations*

Standard international economic models with life cycle/permanent income consumption behavior predict that international portfolio diversification leads to high bilateral consumption correlations. Thus international consumption correlations have been empirically estimated as a test of international portfolio diversification and risk sharing. In this paper we investigate the international consumption correlations generated by a more general model which incorporates habit formation in consumption. We show that, in the presence of a common shock, habit formation itself can generate positive international consumption correlations even in the absence of any international risk sharing. Empirical evidence presented in this paper suggests habit formation characterizes consumption behavior among most of the G‐7 countries. Thus, the extent of international portfolio diversification may be even lower than that suggested by previous research which studied international consumption correlations.     

The role of labor markets for euro area monetary policy

In this paper, we explore the role of labor markets for monetary policy in the euro area in a New Keynesian model in which labor markets are characterized by search and matching frictions. We first investigate to which extent a more flexible labor market would alter the business cycle behavior and the transmission of monetary policy. We find that while a lower degree of wage rigidity makes monetary policy more effective, i.e. a monetary policy shock transmits faster onto inflation, the importance of other labor market rigidities for the transmission of shocks is rather limited. Second, having estimated the model by Bayesian techniques we analyze to which extent labor market shocks, such as disturbances in the vacancy posting process, shocks to the separation rate and variations in bargaining power are important determinants of business cycle fluctuations. Our results point primarily towards disturbances in the bargaining process as a significant contributor to inflation and output fluctuations. In sum, the paper supports current central bank practice which appears to put considerable effort into monitoring euro area wage dynamics and which appears to treat some of the other labor market information as less important for monetary policy.