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991.
Linking together two optimal control theory problems through Bellman's equation we derive closed form solutions for an extractive industry when a shift in the demand curve is perfectly foreseen. Monopoly and competition are compared.  相似文献   
992.
Une stratégie qui se dit neuve pour affronter la crise économique en cours semble avoir provoqué un nombre ? effets négatifs aux Etats-Unis (et ailleurs). Un taux de chǒmage élevé, une inégalité croissante, ainsi que des services publics qui se détériorent, sont les résultats ? un effort de re-capitalisation du capitalisme achevé par la promotion ? investissements et de profits privés. Ceci est le cadre pour un développement possible ? agitation ouvrière et de mouvements sociaux urbains. Les perspectives limités de beaucoup de mouvements sociaux urbains américains ne veulent nécessairement pas dire qu'ils manquent de signification. L'époque de la réforme structurelle doit ětre gagnée; elle est rarement déja acquise.  相似文献   
993.
994.
Using data from the PSID, we estimate a dynamic model of housing demand with nonconvex adjustment costs, credit constraints, and uncertainty about income and home prices. We simulate how consumer behavior responds to house price and income declines as well as tightening credit. In response to a negative home price shock, households early in the life cycle climb the housing ladder more quickly and invest more in housing assets due to the lower price. With a concurrent negative income shock, however, housing demand falls among young and middle aged households who stay in smaller homes rather than to trade up.  相似文献   
995.
Abstract

Actuaries, like other business professionals, communicate quantitative ideas graphically. Because the process of reading, or decoding, graphs is more complex than reading text, graphs are vulnerable to abuse. To underscore this vulnerability, we give several examples of commonly encountered graphs that mislead and hide information. To help creators design more effective graphs and to help viewers recognize misleading graphs, this article summarizes guidelines for designing graphs that show important numerical information. When designing graphs, creators should:
  • (1) Avoid chartjunk

  • (2) Use small multiples to promote comparisons and assess change

  • (3) Use complex graphs to portray complex patterns

  • (4) Relate graph size to information content

  • (5) Use graphical forms that promote comparisons

  • (6) Integrate graphs and text

  • (7) Demonstrate an important message

  • (8) Know the audience.

Some of these guidelines for designing effective graphs, such as (6), (7) and (8), are drawn directly from principles for effective writing. Others, such as guidelines (3), (4) and (5), come from cognitive psychology, the science of perception. Guidelines (1) and (2) have roots both in effective writing and in graphical perception. For example, the writing principle of brevity demonstrates how eliminating pseudo three-dimensional perspectives and other forms of chartjunk improve graphs. As another example, the writing principle of parallel structure suggests using small multiple variations of a basic graphical form to visualize complex relationships across different groups and over time.

To underscore the scientific aspect of graphical perception, we examine the process of communicating with a graph, beginning with a sender’s interpretation of data and ending with a receiver’s interpretation of the graph. In keeping with scientific tradition, this article discusses several studies in the literature on the effectiveness of graphs.

We conclude that the actuarial profession has many opportunities to improve its practice, making communication more efficient and precise.  相似文献   
996.
The UK government has committed itself to improving the representation of women in public service and has introduced a number of legislative measures, policies and development programmes to do this. In 2006, the government enacted a regulatory duty, placed on public sector organizations, to mainstream gender equality in policy and service delivery. This article explores the extent to which this duty could promote gender equality and makes some recommendations for improving the representation of women.  相似文献   
997.
Knowledge issues are central to governance choice. Organization structure influences knowledge flows and costs of knowledge creation and exchange inside the firm. Yet the question of how a firm's internal structure affects its governance choice for new activities has received scant empirical attention. We examine the role of internal structure, specifically unit autonomy and lateral coordination, in a firm's governance decision for new, knowledge‐intensive activities. The findings show that internal structure is a ‘shift parameter’ that affects governance choice by moderating the relationship between task complexity and degree of integration. The empirical setting is the U.S. banking industry and its adoption of Internet banking. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   
998.
There has been much debate concerning the performance of family firms and the drivers of their performance. Some scholars have argued that family management is to blame when family firms go wrong; others claim that family management removes costly agency problems and encourages stewardship. Our thesis is that these disagreements can only be resolved by distinguishing among different types of family firms. We argue that family CEOs will outperform in smaller firms with more concentrated ownership and underperform in larger firms with more dispersed ownership; they will do neither where firms are smaller and ownership is more dispersed or firms are larger and ownership is more concentrated. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   
999.
We examine the role of financial development in economic growth in the former Communist countries of Central and Eastern Europe and the Commonwealth of Independent States during the first two decades since the beginning of transition. These countries, which had undeveloped financial systems under Communism, provide an interesting test of the relationship between financial development and growth. Our study is the broadest in terms of coverage and time period. We find that measures of financial market efficiency and competitiveness are more important than the size of the market in terms of promoting economic growth.  相似文献   
1000.
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