首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   863篇
  免费   17篇
财政金融   119篇
工业经济   52篇
计划管理   146篇
经济学   216篇
综合类   19篇
运输经济   9篇
旅游经济   13篇
贸易经济   175篇
农业经济   38篇
经济概况   93篇
  2022年   3篇
  2021年   5篇
  2020年   10篇
  2019年   16篇
  2018年   15篇
  2017年   19篇
  2016年   20篇
  2015年   15篇
  2014年   19篇
  2013年   99篇
  2012年   49篇
  2011年   17篇
  2010年   36篇
  2009年   23篇
  2008年   43篇
  2007年   25篇
  2006年   28篇
  2005年   23篇
  2004年   11篇
  2003年   13篇
  2002年   27篇
  2001年   23篇
  2000年   18篇
  1999年   19篇
  1998年   18篇
  1997年   17篇
  1996年   11篇
  1995年   14篇
  1994年   10篇
  1993年   5篇
  1992年   15篇
  1991年   14篇
  1990年   8篇
  1989年   12篇
  1988年   4篇
  1987年   6篇
  1986年   12篇
  1985年   7篇
  1984年   14篇
  1983年   11篇
  1982年   11篇
  1981年   15篇
  1980年   10篇
  1979年   15篇
  1978年   4篇
  1977年   4篇
  1975年   10篇
  1972年   3篇
  1934年   6篇
  1890年   2篇
排序方式: 共有880条查询结果,搜索用时 15 毫秒
101.
The Asian disease problem (ADP), as a demonstration of the framing effect, revealed a preference reversal between options perceived as risky and those perceived as certain. This research identifies individuals' involvement level as a moderator of the framing effect. The framing effect in the ADP consisted of emotional choice outcomes regarding human lives. Two studies in this paper demonstrate that when based on emotional choices, the framing effect in high involvement conditions increases in size. Interestingly, this influence of involvement reverses when the framing effect is based on rational choices. The studies reveal that the negativity invoked by the certain loss option is instrumental in the underlying mechanism of the risky choice framing effect, such as that demonstrated by the ADP. Copyright © 2014 ASAC. Published by John Wiley & Sons, Ltd.  相似文献   
102.
Successful leaders create structural elements in order to achieve the performance objectives set forth by organizational strategy. Supply chain oriented structural elements are reflected in an organization's relationships, both within the firm and with supply chain partners. In this research effort, we examine how such structural elements can be created as a means through which to enhance performance. Our hypothesized model is rooted in strategy‐structure‐performance theory and integrates elements of servant leadership theory and social exchange theory to explain how building organizational commitment via servant leadership behaviors can ultimately impact performance. We use a survey method to collect data from 158 motor carriers. The results of our structural equation model support our hypotheses and serve to extend the discussion of supply chain structural elements and the role of leadership style in achieving organizational performance.  相似文献   
103.
When analyzing relative performance, especially at the institutional level, the traditional data envelopment analysis (DEA) models do not recognize vastly different and important activities as separate functions and therefore cannot identify which function may be the main source of inefficiency. We propose a novel two-stage DEA model that decomposes the overall efficiency of a decision-making unit into two components and demonstrate its applicability by assessing the relative performance of 66 large mutual fund families in the US over the period 1993–2008. By decomposing the overall efficiency into operational management efficiency and portfolio management efficiency components, we reveal the best performers, the families that deteriorated in performance, and those that improved in their performance over the sample period. We also make frontier projections for poorly performing mutual fund families and highlight how the portfolio managers have managed their funds relative to the others during financial crisis periods.  相似文献   
104.
The study of public health policy in the less developed countries (LDCs) is handicapped by both lack of adequate data and gaps in conceptual apparatus. A new conceptual model is proposed that would be used for future policy analyses to assess what changes in health status of population in LDCs can be expected as direct functions of increased health service resources, and of improved environmental and econosociocultural conditions.While direct policy analysis is ill-advised at this time due to data inadequacy, the model is illustrated using data presently available for twenty-five relatively homogeneous sub-Sahara African countries. Within the limitations of available data, the findings suggest that reductions in mortality in the region might best be achieved by making appropriate health resources available to the populations. Study findings also suggest that physicians contributed more during the study period to the variance in physical health status than did medical assistants.  相似文献   
105.
In the light of the currently prevalent view that shop stewards are becoming more involved in trade union government, the author suggests that we look more carefully at unverified assumptions of shop steward incorporation.  相似文献   
106.
U. D. Naik 《Metrika》1974,21(1):215-221
Summary For estimating certain parametric functions, we consider the problem of allocatingN i, the size of the sample from theith population,i=1,2,...,k, at the second phase of sampling of a two phase sampling procedure, given that we taken i observations from the population at the first phase. We consider that the observations from theith population follow the exponential distribution with mean i,i=1,2,...,k, and the functions to be estimated are (i) (di/i) and (ii) (dii). When the total cost of sampling at the second phase is c iNi and is fixed, allocations using the Bayes approach are obtained so that the estimation is as precise as is possible.  相似文献   
107.
This paper describes a new approach for closing the gap between the tools for strategic goal management and operational management in Pharmaceutical R&D. The strategic level may concern with expectation of sales, rising from new products and with total R & D budget. The operational level concerns with project selection, project and multiproject management problems, solution of project related technical problems, determination of the size of the various functions and the functional management. This new method combines the R & D project portfolio management with a steady state concept allowing the attainment of a constant number of projects under development and a continuous full use of the capacity available.  相似文献   
108.
109.
Abstract

We consider two models in which the logarithm of the price of an asset is a shifted compound Poisson process. Explicit results are obtained for prices and optimal exercise strategies of certain perpetual American options on the asset, in particular for the perpetual put option. In the first model in which the jumps of the asset price are upwards, the results are obtained by the martingale approach and the smooth junction condition. In the second model in which the jumps are downwards, we show that the value of the strategy corresponding to a constant option-exercise boundary satisfies a certain renewal equation. Then the optimal exercise strategy is obtained from the continuous junction condition. Furthermore, the same model can be used to price certain reset options. Finally, we show how the classical model of geometric Brownian motion can be obtained as a limit and also how it can be integrated in the two models.  相似文献   
110.
This paper presents data from an in-depth study conducted among street children in an urban setting in Tanzania. It examines the reasons ‘children of the street’ leave their homes, how they survive and meet their daily needs, what problems they encounter whilst on the streets and how they surmount them. The paper also examines the implications of street life for children’s health. The findings show that general poverty lies at the center of the increasing number of street children in Tanzania. Street life makes the children vulnerable to a variety of problems including ill health. Policies in Tanzania have so far failed to solve this problem, particularly because social policies have been dealing with symptoms rather than essential causes. The paper ends by outlining short- and long-term policy solutions and also suggests directions for future research and early intervention. — Cet article présente les données d’une étude en profondeur conduite parmi les enfants des rues dans un cadre urbain en Tanzanie. Il explore les raisons pour lesquelles ‘les enfants des rues’ partent de chez eux, comment ils survivent et surviennent à leurs besoins quotidiens, les problèmes qu’ils rencontrent dans les rues et comment ils les surmontent. Cet article examine aussi les implications de la vie dans la rue pour la santé des enfants. Les résultats montrent que la pauvreté générale est la raison centrale du nombre croissant d’enfants dans les rues en Tanzanie. La vie dans les rues rend les enfants susceptibles à de nombreux problèmes, y compris la mauvaise santé. La politique de la Tanzanie n’a pas encore réussi à résoudre ce problème, en particulier parce que la politique sociale a adressé les symptômes plutôt que les causes essentielles. Cet article propose des solutions politiques à court et à long terme et suggère également des options pour les recherches futures et pour des interventions précoces.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号