Monitoring and Forecasting Currency Crises

Can we improve forecasts of currency crises by using a large number of predictors? Which predictors should we use? This paper evaluates the performance of traditional leading indicators and a new Diffusion Index (DI) method as Early Warning Systems to monitor the risk and forecast the likelihood of the recent currency crises in East Asia. We find that the DI performs quite well in real time. For most countries, the forecasted probabilities of a crisis increase substantially around the actual time of the crisis. The economic variables that help in forecasting future crises are output growth, interest rates and money growth.     

Heterogeneous Consumers and Fiscal Policy Shocks

This paper studies empirical facts regarding the effects of unexpected changes in aggregate macroeconomic fiscal policies on consumers that differ depending on individual characteristics. We use data from the Consumption Expenditure Survey to estimate individual‐level responses and multipliers for government spending. We find that unexpected fiscal shocks have substantially different effects on consumers depending on their income and age levels: the wealthiest individuals tend to behave according to predictions of standard Real Business Cycle (RBC) models, whereas the poorest ones behave according to standard IS–LM (non‐Ricardian) models, most likely due to credit constraints. Furthermore, government spending policy shocks tend to decrease consumption inequality.     

WELFARE GAINS AND LOSSES IN SUNSPOT EQUILIBRIA*

We study a standard two period exchange economy with one nominal asset. As is well known, there is a continuum of sunspot equilibria around each efficient equilibrium. A sunspot equilibrium is inefficient but some households may gain in sunspot equilibria relative to the efficient equilibrium. We show that a household's equilibrium utility level is either locally maximized or locally minimized at the efficient equilibrium, and derive a condition which identifies whether or not a household's utility is locally minimized or maximized.     

HOW DO JAPANESE HEALTH INSURANCE SOCIETIES FINANCE THEIR CONTRIBUTIONS TO THE HEALTH SERVICE SYSTEMS FOR THE ELDERLY?*

We examine how Japanese health insurance societies finance (or distribute) the costs (or cost savings) from an increase (or decrease) in contributions to the Health Service Systems for the Elderly. Three ways are possible: (i) adjusting the premiums of the employee or employer; (ii) providing an optional benefit; and (iii) adjusting reserves by the change in contribution. We find that more than six‐sevenths of the changes are associated with changes in reserves, followed by premiums, and finally optional benefits. The increase in the premium mostly shifted to employees, while employees enjoyed a nearly 60% decrease in total premium.     

INCOMPLETE INFORMATION GAMES WITH MULTIPLE PRIORS*

We present a model of incomplete information games, where each player is endowed with a set of priors. Upon arrival of private information, it is assumed that each player “updates” his set of priors to a set of posterior beliefs, and then evaluates his actions by the most pessimistic posterior beliefs. So each player's preferences may exhibit aversion to ambiguity or uncertainty. We define a couple of equilibrium concepts, establish existence results for them, and demonstrate by examples how players’ views on uncertainty about the environment affect the strategic outcomes.     

MEAN‐PLUS‐NOISE FACTOR MODELS: AN EMPIRICAL EXPLORATION

In this paper I propose an alternative factor model whose common factor follows a mean‐plus‐noise process. While the existing methods for factor models should be valid for this model, their performance may be misleading in small samples. Because the likelihood function of this model is not tractable, I estimate this model by Bayesian methods. When applied to US macroeconomic time series, we find that the estimated mean‐plus‐noise factor is useful for predicting real personal income, industrial production and unemployment at long prediction horizons.     

Constrained Inefficiency and Optimal Taxation with Uninsurable Risks

When individuals' labor and capital income are subject to uninsurable idiosyncratic risks, should capital and labor be taxed, and if so how? In a two‐period general equilibrium model with production, we derive a decomposition formula of the welfare effects of these taxes into insurance and distribution effects. This allows us to determine how the sign of the optimal taxes on capital and labor depend on the nature of the shocks and the degree of heterogeneity among consumers' income, as well as on the way in which the tax revenue is used to provide lump‐sum transfers to consumers. When shocks affect primarily labor income and heterogeneity is small, the optimal tax on capital is positive. However, in other cases a negative tax on capital is welfare‐improving.     

EFFECTS OF IMPROVING INFRASTRUCTURE QUALITY ON BUSINESS COSTS: EVIDENCE FROM FIRM‐LEVEL DATA IN EASTERN EUROPE AND CENTRAL ASIA

Public infrastructure is one of the important determinants of economic growth. Not only access to but also quality of infrastructure affects firm productivity as well as people's livelihood. Frequent interruptions of the infrastructure‐service supply impose extra backup costs on enterprises, hinder their timely business activities, and result in large losses of sales opportunities. This paper focuses on the impacts of improving the quality of public utilities (electricity, water supply, and telecommunications), using firm‐level data from 26 transition economies in Eastern Europe and Central Asia. The results suggest that firm costs would significantly increase when electricity outages occur frequently and the outage duration becomes longer. Similarly, when more time is required to restore suspended water supply, firms' competitiveness would be weakened. Not surprisingly, the impacts tend to vary depending on industry. The construction, manufacturing, and hotel and restaurant sectors are found particularly vulnerable.     

THE LIQUIDITY TRAP AND PERSISTENT UNEMPLOYMENT WITH DYNAMIC OPTIMIZING AGENTS: EMPIRICAL EVIDENCE

Standard money-in-utility dynamic models assume satiable liquidity preference, and thereby prove the existence of a full-employment steady state. In the same framework, it is known that under insatiable liquidity or wealth preference there is a case where a full-employment steady state does not exist. A liquidity trap then arises and unemployment persists in the steady state. Using both parametric and non-parametric methods, this paper empirically finds that insatiable liquidity/wealth preference is better supported. Thus, without assuming any permanent distortion, we can analyse an effective demand shortage in a dynamic optimization framework.