中国失衡时代是否已终结

过去十年,全球性不均衡问题逐渐成为各国宏观经济政策的中心议题。本文重点分析了当前中国的外部失衡问题,研究了2008年后促使中国经常账户盈余下降的影响因素,预测了中国外部顺差的走向。本文认为,未来几年中国的经常账户盈余将保持适度。外部失衡不能反映当今中国国际收支的主要特征。随着中国国内经济越来越依赖投资的拉动,内部失衡问题将愈发明显。     

Interdependence and the location of economic activities

This paper deals with the ability of a decentralized price system to sustain an optimal assignment of activities assuming complete interdependence among them. There are two goods, each of which is used in its own production and in the production of the other, along with land. An infinitely elastic final demand exists for both goods at given market prices, and either good may be imported. It is demonstrated that a decentralized price system will sustain an optimal allocation of land, and that a nonoptimal allocation of land will not be sustained.     

Bank Consolidations and Minority Neighborhoods

This paper explores the relationship between neighborhood racial composition and the level of banking services. We use unique census tract-level data on banking services and neighborhood characteristics in Alameda County, California, from points in time before and after the recent wave of bank consolidations to eliminate as well as possible the potential for omitted variables bias that could plague cross-sectional study of the issue. Using a variety of specifications and numerous sensitivity checks, we find that minority neighborhoods (particularly black neighborhoods) are less likely to have banking services, and are more likely to lose services during bank consolidations.     

Stability of international stock market relationships across month of the year and different holding intervals

Potential benefits from international diversification depend upon the stability in stock market relationships. Using monthly data of 11 international stock markets, this paper examines the stability in stock market relationships across month of the year and across different holding intervals. Empirical results show that the correlation structure is more stable than the covariance structure. While empirical evidence supports the hypothesis that the correlation structure is very stable across different holding intervals, the empirical support for the stability in correlation structure across month of the year is much weaker.     

Einzelbesprechungen

Ohne ZusammenfassungAus dem Italienischen übersetzt von M. St. Braun, WienAus dem Italienischen übersetzt von E. Allina, WienAus dem Russischen übersetzt von A. GerschenkronÜbersetzt von Paul Brüll, Wien.     

The Eisner Puzzle,the Unemployment Threshold and the Range of Equilibria

Using a two-regime model of the inflation-unemployment process for US data 1960:2 to 2000:2, this paper finds strong evidence to support the Eisner puzzle, which occurs when the short-run Phillips curve (SRPC) is flatter at low rates of unemployment than at higher rates. The puzzling aspect of this pattern is the expectation of excess demand to become apparent at very low rates of unemployment causing the SRPC to be steep rather than fairly flat. We show the puzzle can be resolved by estimating a three-regime model which reveals a steep SRPC at very low rates of unemployment. The estimates of the three regime model also reveal a horizontal SRPC at intermediate rates of unemployment, implying the existence of a range of equilibrium rates of unemployment at those intermediate rates.

Literature-related discovery (LRD): Lessons learned, and future research directions

Literature-related discovery (LRD) is the linking of two or more literature concepts that have heretofore not been linked (i.e., disjoint), in order to produce novel, interesting, plausible, and intelligible knowledge (i.e., potential discovery). The open discovery systems (ODS) component of LRD starts with a problem to be solved, and generates solutions to that problem through potential discovery. We have been using ODS LRD to identify potential treatments or preventative actions for challenging medical problems, among myriad other applications. The five immediately preceding papers in this Special Issue describe the application of ODS LRD to Raynaud's Phenomenon (RP), cataracts, Parkinson's Disease (PD), Multiple Sclerosis (MS), and Water Purification (WP). We describe the lessons learned from each application, and how the techniques can be improved further.Generation of much potential discovery using ODS LRD is possible when the conceptual roadblocks to discovery are removed. Some of these roadblocks include use of numerical filters that are unrelated to generating discovery, and excessive reliance on literatures directly related to the problem literature of interest. The issue of how to handle large amounts of potential discovery has not been addressed in the literature, since most ODS LRD researchers have tried to find a relatively few potential discovery items. We present a development strategy that capitalizes on the large amounts of potential discovery we have identified.     

INTERACTIONS BETWEEN WELFARE CASELOADS AND LOCAL LABOR MARKETS

This paper provides an empirical examination of interactions between welfare caseloads and local labor markets using data on caseload stocks, entries, and exits. Granger‐causality tests show that unemployment rates Granger‐cause caseload activity but caseload activity does not Granger‐cause unemployment rates. The results also reveal differential dynamics between caseloads and labor market conditions for rural versus metropolitan markets. Several models of one‐way association between caseload activity and unemployment rates are presented. The results show that higher unemployment rates are positively associated with welfare caseloads and entries and negatively related to exits. (JEL I38, R23)