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   47050篇
  免费   647篇
财政金融   8111篇
工业经济   2909篇
计划管理   7686篇
经济学   10698篇
综合类   741篇
运输经济   198篇
旅游经济   506篇
贸易经济   9365篇
农业经济   1454篇
经济概况   5249篇
信息产业经济   44篇
邮电经济   736篇
  2021年   207篇
  2020年   327篇
  2019年   425篇
  2018年   2773篇
  2017年   2540篇
  2016年   1756篇
  2015年   556篇
  2014年   776篇
  2013年   3222篇
  2012年   1266篇
  2011年   2719篇
  2010年   2512篇
  2009年   2307篇
  2008年   2337篇
  2007年   2557篇
  2006年   815篇
  2005年   1049篇
  2004年   1112篇
  2003年   1189篇
  2002年   881篇
  2001年   694篇
  2000年   690篇
  1999年   543篇
  1998年   559篇
  1997年   517篇
  1996年   530篇
  1995年   464篇
  1994年   518篇
  1993年   520篇
  1992年   481篇
  1991年   516篇
  1990年   465篇
  1989年   392篇
  1988年   393篇
  1987年   389篇
  1986年   415篇
  1985年   582篇
  1984年   542篇
  1983年   551篇
  1982年   529篇
  1981年   461篇
  1980年   449篇
  1979年   464篇
  1978年   391篇
  1977年   354篇
  1976年   290篇
  1975年   280篇
  1974年   261篇
  1973年   244篇
  1972年   205篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
I survey the literature post Ledyard (Handbook of Experimental Economics, ed. by J. Kagel, A. Roth, Chap. 2, Princeton, Princeton University Press, 1995) on three related issues in linear public goods experiments: (1) conditional cooperation; (2) the role of costly monetary punishments in sustaining cooperation and (3) the sustenance of cooperation via means other than such punishments. Many participants in laboratory public goods experiments are “conditional cooperators” whose contributions to the public good are positively correlated with their beliefs about the average group contribution. Conditional cooperators are often able to sustain high contributions to the public good through costly monetary punishment of free-riders but also by other mechanisms such as expressions of disapproval, advice giving and assortative matching.  相似文献   
992.

Peru is the second-largest producer and exporter of copper in the world. This paper proposes a novel approach to assess short-run and long-run effects of copper on Peru’s recent economic growth. Annual data over the 2014–2018 period were used to calculate a Mining Contribution Index (MCI). An institutional quality indicator of the World Competitiveness Index of the World Economic Forum measured the dependence of Peruvian economic growth on mining and the quality of its institutions, respectively. Then, monthly data during the period 2005–2018 were used to run vector autoregressive (VAR) and vector error correction (VEC) models to measure copper’s effects on the country’s economy over time. VAR-VEC models included copper production, exports, international price, investment, taxes paid by producing companies, and Peru’s gross domestic product (GDP). Stationarity and causality of variables were verified with the Augmented Dickey-Fuller and Granger tests, respectively. Due to the presence of non-stationary variables, a VEC model was implemented to forecast short- and long-run effects. The main results show that real GDP responds to copper output and other related explanatory variables differently, depending upon the instrument applied. Peruvian GDP has increased dependence on copper mining. The quality of its institutions could explain the presence of Dutch Disease or resource curse theory. Short- and long-run effects of copper output on GDP were generally statistically non-significant. GDP was statistically significant in relation to other mining variables, such as copper exports and the international price of copper.

  相似文献   
993.
Indirect reciprocity is generally considered one of the leading mechanisms to explain how cooperation may emerge by natural selection. The basic intuition is that establishing a reputation of being a helpful individual increases the probability of being in turn helped. Two models have been proposed to describe how indirect reciprocity may work: the standing model (Sugden 1986/2004 in The economics of rights, cooperation and welfare. Blackwell, Oxford.) and the image-scoring model (Nowak and Sigmund 1998a in Nature 393:573–577, b in J Theoretical Biol 194:561–574). Although there is evidence that the former model would perform better under a wide set of circumstances, it is often maintained that it requires individuals with an implausibly large capacity of processing recursive information. In this paper, I argue that this is not actually the case. I further emphasize that even if the hypothesis of indirect reciprocity is unable to give a fair account of the ecological bases of cooperation, it has inspired a deal of research precious to social sciences.  相似文献   
994.
In The Economics of Rights, Co-operation and Welfare (1986), Robert Sugden follows the tradition from Thomas Schelling and David Lewis in ascribing a central role to the notion of salience within his theory of convention. However, against this, Bruno Verbeek (Instrumental rationality and moral philosophy, Kluwer, Dordrecht, 2002) has argued that an empirically adequate notion of salience may not be incorporated into a generic account of convention without circularity obtains. This paper examines Verbeek’s argument against a background of experimental as well as theoretical work on coordination problems. It finds that the argument fails to consider at least two candidate theories of salience that may be incorporated into the theory of convention without circularity: cognitive hierarchy theory that iterates Sugden’s notion of psychological salience and Schelling salience. Thus, in the end Verbeek’s criticism of the role ascribed to salience in theories of convention may be dismissed, though its discussion draws a fruitful perspective.  相似文献   
995.
996.
997.
998.
999.
Strategic niche management (SNM) is a recently developed approach that could help induce a broad socio-technical transition towards more sustainable development. It is designed to facilitate the introduction and diffusion of new sustainable technologies through protected societal experiments in fields such wind energy, biogas, public transport systems, electric vehicle transport and eco-friendly food production. A major challenge in SNM concerns the processes by which such experiments can evolve into viable market niches and ultimately contribute to a broader shift towards sustainable development. This paper sheds more light on this issue by systematically consolidating the main SNM studies, and by bringing in new insights from the literature that is in some sense complementary to SNM. These are studies on the development and commercialisation of radical innovations in large companies, and literature about infant industry protection and broader industrialisation processes in developing countries. A number of suggestions for implementing SNM are given.  相似文献   
1000.
Second chance offers versus sequential auctions: theory and behavior   总被引:2,自引:0,他引:2  
Second chance offers in online marketplaces involve a seller conducting an auction for a single object and then using information from the auction to offer a losing bidder a take-it-or-leave-it price for another unit. We theoretically and experimentally investigate this practice and compare it to two sequential auctions. We show that the equilibrium bidding strategy in the second chance offer mechanism only exists in mixed strategies, and we observe that this mechanism generates more profit for the auctioneer than two sequential auctions. We also observe virtually no rejections of profitable offers in the ultimatum bargaining stage.   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