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   2516篇
  免费   73篇
财政金融   498篇
工业经济   175篇
计划管理   398篇
经济学   550篇
综合类   43篇
运输经济   19篇
旅游经济   43篇
贸易经济   559篇
农业经济   63篇
经济概况   241篇
  2023年   19篇
  2021年   25篇
  2020年   43篇
  2019年   55篇
  2018年   55篇
  2017年   62篇
  2016年   71篇
  2015年   40篇
  2014年   56篇
  2013年   278篇
  2012年   68篇
  2011年   75篇
  2010年   76篇
  2009年   74篇
  2008年   66篇
  2007年   91篇
  2006年   72篇
  2005年   68篇
  2004年   62篇
  2003年   61篇
  2002年   70篇
  2001年   51篇
  2000年   43篇
  1999年   60篇
  1998年   57篇
  1997年   34篇
  1996年   41篇
  1995年   43篇
  1994年   38篇
  1993年   21篇
  1992年   36篇
  1991年   33篇
  1990年   20篇
  1989年   31篇
  1988年   24篇
  1986年   27篇
  1985年   50篇
  1984年   44篇
  1983年   41篇
  1982年   33篇
  1981年   28篇
  1980年   34篇
  1979年   38篇
  1978年   35篇
  1977年   35篇
  1976年   27篇
  1975年   27篇
  1974年   33篇
  1973年   17篇
  1972年   16篇
排序方式: 共有2589条查询结果,搜索用时 15 毫秒
991.
On apprend plus par la conversation des Doctes,

que par la lecture de leurs livres

Les épistres de Seneque

Translation by François de Malherbe,

Paris, Anthoine de Sommaville, 1639, p. 21

Small and medium-sized enterprises, because of their limited resources, use a variety of sources and are linked to different networks to obtain the information they need to develop their strategy and then to gradually organize their environment. Among other things, networks keep them up-to-date with changes in the economy and allow them to take advantage of opportunities to innovate, thus remaining ahead of their competitors. The networks – personal or business – with which these firms interact the most are usually geographically or sociologically close by, embedded in the environment, and are known as strong tie networks. They generally supply signals in a familiar language, based on habit as well a good reciprocal knowledge, which are easy to understand. In addition to this, however, the most dynamic firms also have contacts with weak tie networks, which are further removed from the usual behaviours of entrepreneurs and provide weak signals that, while difficult to grasp and decode, nevertheless offer new, pre-competitive information that can support major innovations. Very little empirical research has been done so far to test the probability of this theory. This paper reports on the results of a survey involving 147 SMEs, all in the land-based transportation equipment sector. It confirms the importance of weak tie networks as opposed to other types of networks, recognizing their complementary contribution to technological innovation. The organization's absorptive capacity is also found to be a significant intermediary factor in taking advantage of weak tie networks.  相似文献   
992.
This study explores the following novel research question: Do attributes relating to the resources and signals of lead entrepreneurs, particularly prior business ownership experience quality signals, reduce the probability that entrepreneurs will be chronic credit-rationed entrepreneurs in a developing economy context with resource deficiencies? Guided by insights from signalling, resource-based view of the firm and human capital theory, profiles of credit-rationed entrepreneurs (i.e. debt finance obtained but below the amount requested) are highlighted. The length of the debt finance gap was considered with regard to temporary (over one year), major (over two years) and chronic (over three years) finance gaps. We find support for our hypotheses relating to entrepreneurs whose firms are more innovative being more likely to be chronically credit-rationed, whilst firms with partners, entrepreneurs with longer prior business ownership experience and habitual entrepreneurs are less likely to be credit-rationed. The interaction with serial or portfolio entrepreneur reduces the chronic credit-rationing problem faced by innovative firms. A case for developing linkages between inexperienced novice entrepreneurs and habitual entrepreneurs, particularly successful portfolio entrepreneurs, is made. Notably, we suggest that building upon the experienced entrepreneurs who do exist may be particularly beneficial in resource deficit contexts such as Ghana  相似文献   
993.
Events that occur over a period of time can be described either as sequences of outcomes at discrete times or as functions of outcomes in an interval of time. This paper presents discounting models for events of the latter type. Conditions on preferences are shown to be satisfied if and only if the preferences are represented by a function that is an integral of a discounting function times a scale defined on outcomes at instants of time.  相似文献   
994.
In this commentary, we reflect on Thornton's (2013) extension to his original CA Magazine article on environmental accounting (Thornton, 1993) as well as the original contribution. Given our background in social and environmental disclosure research, we question Thornton's narrow focus on environmental accounting as it relates to the debits and credits of financial reporting, and we attempt to illustrate the problems that voluntary environmental disclosure creates with respect to reduced incentives for companies to improve environmental performance. We conclude by identifying our concerns with the future of environmental accounting given the recent ‘rediscovery’ of the topic by mainstream accounting researchers.  相似文献   
995.
Government‐protected banking systems tend to blow up, imposing huge losses on taxpayers. In a recent much‐publicized book, The Bankers' New Clothes, Anat Admati and Martin Hellwig propose to fix this problem by forcing banks to maintain 25% of their assets in the form of equity rather than debt. But this author argues, the book overstates the benefits and understates the costs of the proposed reform, while also failing to identify additional necessary reforms. Because bank equity is not true equity, and equity must be evaluated only in relation to risk, increasing required book equity ratios will not necessarily reduce the risk of bank failure significantly. Raising equity requirements is also socially costly because it reduces banks' willingness to lend. When banks need to raise their equity‐to‐asset ratios, they often choose to do so by cutting back on new loans, rather than paying the high costs of raising new equity. The reduction in loan supply that comes from raising equity ratios can be substantial, and is not just a one‐time cost. Balancing the costs and benefits of higher equity implies a much lower required equity ratio than the 25% posited in The Bankers' New Clothes. Finally, because equity ratios relative to risk should be the focus of prudential regulation, additional regulatory policy reforms that strengthen incentives for more effective risk management are needed in addition to higher capital ratios.  相似文献   
996.
A simultaneous equations framework is used to study the relationship between structure, conduct and performance in US manufacturing in the 1980s and 1990s. The paper expands on earlier structure-conduct-performance studies by using a lag structure to signify that structure, conduct and performance do not affect one another contemporaneously. Findings support some aspects of the traditional structure-conduct-performance model, but challenge others. First, the data suggest that industry structure does not depend on current industry performance. Second, little evidence is found that industry conduct, proxied by advertising, is affected by industry structure. Third, results show that industry performance does not depend on industry conduct, though it is sensitive to industry structure. The main findings are that (1) concentration does not depend on firm profitability, though profitability depends on concentration, (2) advertising follows a process that is independent of the factors considered here, and (3) advertising seems to have no effect on profitability.  相似文献   
997.
In this paper, the performance of the New Keynesian IS curve for the G7 countries is assessed. It is found that there is an IS puzzle for both the purely backward-looking as well as for the forward-looking IS curve. The real interest rate does not have a significantly negative effect on the output gap. Based on an extended specification of the IS curve, also including asset prices and monetary aggregates, a significantly negative interest rate effect on aggregate demand is found for all countries. This finding suggests that a richer specification of the IS curve in empirical work may be necessary in order to obtain an unbiased estimate of the effect of monetary policy on aggregate demand.  相似文献   
998.
This article develops a broad theme about treatment under ambiguity through study of a particular decision criterion. The broad theme is that a planner may want to cope with ambiguity by diversification, assigning observationally identical persons to different treatments. Study of the minimax‐regret (MR) criterion substantiates the theme. The article significantly extends my earlier analysis of one‐period planning with an individualistic treatment and a linear welfare function. I show that MR treatment allocations are fractional in a large class of planning problems with nonlinear welfare functions, interacting treatments, learning, and noncooperative aspects.  相似文献   
999.
Auctions with costly information acquisition   总被引:1,自引:0,他引:1  
We characterize optimal selling mechanisms in auction environments where bidders must incur a cost to learn their valuations. These mechanisms specify for each period, as a function of the bids in previous periods, which new potential buyers should be asked to bid. In addition, these mechanisms must induce the bidders to acquire information about their valuations and to reveal this information truthfully. Using a generalized Groves principle, we prove a very general “full extraction of the surplus” result: the seller can obtain the same profit as if he had full control over the bidders’ acquisition of information and could have observed directly their valuations once they are informed. We also present appealing implementations of the optimal mechanism in special cases. For helpful comments we thank George Deltas, David Martimort, an anonymous referee, and seminar participants in Mannheim, Rutgers, Tel Aviv, Toulouse, the Society for Economic Design 2002 conference in New York, and the 2003 North American Summer Meetings of the Econometric Society in Evanston, IL. Yossi Spiegel thanks the IIBR for financial assistance and Charles Zheng thanks the NSF for grant SES-0214471.  相似文献   
1000.
This article examines how the action logics associated with the stages of consciousness development of organizational leaders can influence the meaning, which these leaders give to corporate greening and their capacity to consider the specific complexities, values, and demands of environmental issues. The article explores how the seven principal action logics identified by Rooke and Torbert (2005, Harvard Business Review 83(4), 66–76; Opportunist, Diplomat, Expert, Achiever, Individualist, Strategist and Alchemist) can affect environmental leadership. An examination of the strengths and limitations of these action logics reveals the relevance of the so-called post-conventional stages of consciousness to the recognition and effective management of complex environmental issues. Suggestions are also made for promoting organizational contexts conducive to the development of a post-conventional environmental leadership.  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