韩国电信(KT)移动WiMAX(WiBro)服务介绍

移动WiMAX与WiBro之间的关系WiBro源自韩国。早在2004年7月韩国信息通讯部(MIC)正式公布移动WiMAX(WiBro)的服务要求之前,韩国电信技术协会(TTA)内部就开展了一项本地     

The decentralisation of employment relations in the British public sector

The aim of this article is to investigate differences between the British public and private sectors in terms of the decentralisation of employment relations. Drawing on data from the 1998 Workplace Employee Relations Survey, the article arrives at three main conclusions. First, the analysis reveals that while local‐level managers in both sectors have similar levels of responsibility for employment relations issues, those in the public sector are, on the whole, significantly less likely to be able to exercise authority. Second, the results indicate some marked variations in practice within the public sector, with managers in education having the greatest level of authority. Finally, the article explores the extent to which differences in local‐level authority between the public and private sectors can be explained by higher‐level collective bargaining, and the presence of higher‐level personnel specialists. These factors have only a partial influence, and do not fully explain why local‐level employee relations managers in some areas (notably health) are less able to exercise authority than their counterparts in the private sector.     

Bureaucrats as "Social Engineers": Federal Welfare Programs in Herbert Hoover's America

A bstract . Historians interested in 20th century American reform often seek to analyze the ideologies of political leaders separately from the institutions that these same leaders created. Such emphases on ideas, as opposed to actions, has, for example, led "revisionist" American historians to argue that the presidencies of Herbert Hoover and Franklin D. Roosevelt were "conceptually continuous." Our examination of the major social welfare programs undertaken by the federal government in the 1920s disputes this claim. Examination of the operations of the federal bureaucracy instead of the rhetoric of politicians demonstrates the existence of decided policy differences between the Hoover and Roosevelt eras. "Efficiency" analogues dominant during the Hoover era were replaced with "direct service-provider" approaches which created a clear distinction between private and public welfare programs. Elements of "continuity" between the two eras have been overdrawn. Background is provided for increased understanding of some of the policy implications of America's contemporary welfare debate—particularly about "rehabilitation" strategies and/or rationales for action in the social welfare field.     

Reduced Form Auctions Revisited

This note uses the Theorem of the Alternative to prove new results on the implementability of general, asymmetric auctions, and to provide simpler proofs of known results for symmetric auctions. The tradeoff is that type spaces are taken to be finite.     

Strategic Reaction of Vertically Integrated Firms to Downstream Entry: Deterrence or Accommodation

The purpose of this paper is to analyze strategic behavior of vertically integrated firms when there is downstream entry, taking into account the balance between competition in the market and competition for the market. This analysis can serve to explain diverse distributional structures, including the coexistence of vertically integrated firms and independent retailers. And it shows that the relative efficiency of downstream entrants and the level of competition among incumbents are two major factors in determining equilibrium configuration.     

Uncertainty and the theory of international trade in long-run equilibrium

We consider a country with two factors and two industries, each of which faces technical and price uncertainty. Entrepreneurs choose outputs in order to maximize the expected utility of profits. They also draw factor payments and purchase consumption goods after the uncertainty isresolved. They enter and exit from an industry according to whether participation there increases their expected utility. Within this model, the validity of the propositions of neoclassical trade theory depends on how the entrepreneurs' entry decisions are affected by parameter changes via their roles as risk bearers, consumers and factor owners.     

The price relationship between organic and non-organic vegetables in the U.S.: evidence from Nielsen scanner data

This study investigates price relationships between organic and conventional carrots, tomatoes, and lettuce in the U.S. utilizing Nielsen scanner data from 2006–2015. We employ a threshold vector error correction model (TVECM), threshold vector autoregressive model (TVAR), and threshold cointegration test to test whether market integration exists between organic and conventional vegetables as well as the existence of asymmetric price transmission. The results find positive long-run relationships between organic and conventional prices of carrots and tomatoes and show the existence of asymmetric price transmission in price pairs of lettuce and tomatoes. Our findings suggest that the price relationship between organic and conventional vegetables varies by characteristics, such as shelf life, volatility in the price premium, and substitutability.     

The mixed economy for public service consumers. The case of consumer agencies for public transportation

The phrase mixed economy of welfare refers to the observation that the provision of public services in western countries frequently involves the participation of other sectors in addition to government. For example, a service may be privately financed and produced but regulated by government, financed by government subsidies or vouchers but produced privately, or produced by a commercial or voluntary organization under contract to government. But such different ways in which government can arrange public service supply by no means exhaust the varieties of arrangements in a mixed economic system. Other examples include alternative institutional arrangements for articulating consumer wants for public services, evaluating consumer satisfaction, and holding the producers of services accountable for their performance.This paper examines the role of official public advisory bodies and private, voluntary associations whose purposes are to improve services to users of U.S. public transportation. At variance with some of the theory of political economy, it is found that the public and private consumer organizations generally enjoy a symbiotic rather than substitute or competitive relationship with one another, and that both kinds of organizations arise and complement each other in addressing the problems of consumers of a government service produced under monopoly conditions.

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Die Beteiligung mehrerer Wirtschaftssektoren bei der Versorgung mit öffentlichen Diensten — der Fall der amerikanischen Verbraucher-Agenturen für öffentlichen Nahverkehr

Zusammenfassung Der Ausdruck mixed economy of welfare bezieht sich auf die Beobachtung, daß die Versorgung mit öffentlichen Gütern in westlichen Ländern häufig nicht allein durch den Staat erfolgt. So kann zum Beispiel ein öffentliches Gut privat finanziert und hergestellt werden, aber unter öffentlicher Aufsicht stehen, oder es kann von der öffentlichen Hand bezahlt aber privat produziert werden, oder es kann durch eine kommerzielle oder gemeinnützige Organisation in Absprache mit staatlichen Stellen produziert werden. Ebenso gibt es Fälle, wo öffentlicher und privater Hersteller eines vergleichbaren Gutes verschiedene Marktseggmente versorgen. Beispielsweise stehen in den USA den Bürgern, die mit öffentlichen Schulen unzufrieden sind, private Schulen zur Verfügung.Diese Beispiele zeigen, auf welchen unterschiedlichen Wegen die Versorgung mit öffentlichen Gütern rangiert werden kann. Solche angebotsorientierten Beispiele zeigen aber nur einen Teil der möglichen Sektorverbindungen in einer Mischwirtschaft. Andere Beispiele treffen eher die Nachfrageseite bei öffentlichen Gütern, insbesondere die institutionellen Möglichkeiten für die Artikulation von Verbraucherwünschen hinsichtlich öffentlicher Güter für die Erfassung der Zufriedenheit und dafür, daß die Anbieter öffentlicher Güter für ihr Leistungsniveau einstehen müssen. Solche Beispiele zeigen, daß Einrichtungen wie Kommissionen für öffentliche Dienste, Departements für Konsumentenfragen, Ombudsmänner und eine Vielzahl privater und freiwilliger Organisationen in unterschiedlichster Weise tätig werden, um die Interessen von Bürgern zu schützen, die öffentliche Leistungen in Anspruch nehmen.Der vorliegende Beitrag betrachtet solche Einrichtungen für öffentlichen Nah- und Fernverkehr in den USA. Ebenso wie in England gibt es hier sowohl offizielle öffentliche Beratungsgremien wie auch private freiwillige Einrichtungen, deren Zielsetzung ganz ähnlich sind, nämlich die Leistungen der öffentlichen Verkehrsunternehmungen zu verbessern. Der Beitrag berichtet über die Ergebnisse einer empirischen Studie beider Arten von Gremien und versucht die Rolle beider Arten in einer Mischwirtschaft zu beschreiben. Insbesondere versucht der Beitrag, zu erklären, warum beide Arten von Gremien entstehen, welches Verhältnis sie zu einander und zu den Transportunternehmen haben. Im Gegensatz zu manchen theoretischen Annahmen erwies sich, daß öffentliche und private Verbraucherorganisationen weniger in einem substitutiven oder wettbewerblichen Verhältnis zueinander stehen, sondern eher eine Symbiose miteinander bilden, und daß sich beide Arten von Organisationen häufig bei der Behandlung von Problemen ergänzen.The author is indebted to his former student and research assistant Chester Phillips for carrying out the survey for this paper. He would also like to thank his colleague Richard Silkman for insightful comments and suggestions on the first draft and Beverly Dolinsky of the Permanent Citizens Advisory Committee to the MTA in New York City for the time and information she provided. Finally, the author wants to thank Ken Judge for providing the stimulus to write this paper through the invitation to participate in the 1983 Social Administration Association Conference in Canterbury, England, where this paper was first presented, and Harry Weiner for arranging support to allow attendance at that conference.

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Dennis R. Young is a Professor at W. Averell Harriman College for Policy Analysis and Public Management, State University of New York at Stony Brook, Stony Brook, New York 11794, USA.     

The Two Faces of Analyst Coverage

We find that positive excess (strong) analyst coverage is associated with overvaluation and low future returns. This finding is consistent with the view that excessive analyst coverage, driven by investment banking incentives and analyst self-interests, raises investor optimism causing share prices to trade above fundamental value. However, weak analyst coverage causes stocks to trade below fundamental values. This finding indicates that investors tend to believe that these firms are more likely to be plagued by information asymmetries and agency problems. The results remain robust after controlling for the possible endogenous nature of analyst coverage and analysts' self-selection bias.