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11.
This study investigated the development of all 3 components of episodic memory (EM), as defined by Tulving, namely, core factual content, spatial context, and temporal context. To this end, a novel, ecologically valid test was administered to 109 participants aged 4-16 years. Results showed that each EM component develops at a different rate. Ability to memorize factual content emerges early, whereas context retrieval abilities continue to improve until adolescence, due to persistent encoding difficulties (isolated by comparing results on free recall and recognition tasks). Exploration of links with other cognitive functions revealed that short-term feature-binding abilities contribute to all EM components, and executive functions to temporal and spatial context, although ability to memorize temporal context is predicted mainly by age.  相似文献   
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The authors explore the debate over whether daily newspapers are natural monopolies and conclude that newspapers do not exhibit the traditional characteristics associated with such monopolies. Nevertheless, the authors argue, newspapers have a proclivity toward monopoly brought on by an interaction of factors, even absent anticompetitive behavior by newspapers. This proclivity provides monopoly power to newspapers similar to that provided by natural monopoly force, they aregue, saying public policy considerations need to take this interactive effect into account.  相似文献   
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This article investigates a model in which 2 newspapers compete between them for readers with differentiated preferences and advertise new products at a cost per reader that decreases as the circulation increases. The model can account for the empirical regularity that the revenues from advertising and the profits of the newspapers increase more than proportionally with the circulation. A complementary finding is that a larger number of potential advertisers lowers the profits of both newspapers.  相似文献   
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祝建华 :本文紧扣传播全球化的核心 ,系统论述跨国媒体公司的成因、方式、影响及其问题 ,有助于我们了解什么是全球化的现实、什么是虚构的憧憬或恐惧。陈力丹 :现任《媒体经济学》杂志 (MediaEconomies)主编、瑞典传媒经济学家皮卡德 ,这次在会上论证了一个非常现实的问题 :跨国传媒公司的经营理念。他的论证全面而深刻 ,令人信服。本期发表的是他发言的要点。  相似文献   
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ABSTRACT

A constant theme in strategic media management literature is the transformational impact that digital media technologies and deregulation have had on shaping media firms’ corporate strategies. Whilst the role of corporate strategy is to encapsulate a firm’s long-term direction and scope of activities, it will also give a strong indication of how the firm will compete and be positioned in an industry. However, the transformative effects of a highly technological media environment have changed our traditional view of how the media industry is defined, and so developing a strategic recipe for competing in an ill-defined industry becomes more challenging. This paper examines a single media firm’s corporate strategy and perimeter and considers this in the context of a changing media industry. The paper takes a practice-led approach by undertaking a longitudinal analysis of a firm’s acquisition and divestment activities in order to understand its corporate perimeter and by implication the industry or industries where it competes. We argue that by exploring a media firm’s corporate strategy and perimeter over time, scholars will not only be able to better understand the dynamics of media practice and strategy, but also gain an insight into the changing nature of the media industry. The paper concludes that the 'five forces framework' on industry structure, profitability and attractiveness remains a relevant form of strategic analysis that can help media management researchers to conceptualize and understand the evolution of media firm corporate perimeter and the industries in which they compete.  相似文献   
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Inaugurated in 2013, this collective research programme aims to construct an international mapping of the history of education that accounts for recent developments in the field. Our goal is to create a current and retrospective assessment of the discipline’s institutional grounding and of the knowledge produced by its practitioners, stretching across national and cultural borders. Ultimately, the programme will help to increase interactions among scholars and facilitate the creation of collaborative research agendas, thereby augmenting the standing and visibility of the discipline.

This text will briefly introduce the programme’s conceptual basis, explaining the methodological steps taken to ensure the comparability of data gathered and the transnational and transcontinental character of the study’s design. In the second section, we will zoom in on doctoral students’ dissertations, which are the optimal way to study a discipline’s development and potential. Doctoral students and recent graduates are part of a tradition, a school of thought, and yet they constitute that tradition’s replacement and renewal. Therefore, as graduate students carry forth the disciplinary torch, they hold the future of the field in their hands.  相似文献   
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In this article, we explore factors that influence the number of broadcasters in a market and the achievement of optimal outcomes in broadcast markets.We explore a range of barriers to entry and means of overcoming those barriers in broadcast markets.We argue that choices regarding and influences on barriers to entry and channel availability act as forms of competition management in broadcast markets. Policymakers and regulators indirectly influence markets by altering the effects of those barriers and directly influence market activities by making decisions regarding the number of competitors, market structures,and-indirectly-the financial performance of broadcasters. We argue that barriers to entry can be controlled to produce competition levels and market outcomes that promote optimal social and economic outcomes.  相似文献   
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Abstract

Debates over the effects and efficacy of different forms of newspaper ownership are rising. This article elucidates the debates by exploring private, public, not-for-profit, and employee ownership using economic and managerial theory about ownership and control of enterprises. It shows the managerial and economic conditions that emerge under the different forms of ownership, their implications, and the advantages and disadvantages of each. The article concludes that there is no perfect form of newspaper ownership.  相似文献   
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