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   30907篇
  免费   297篇
财政金融   5373篇
工业经济   1810篇
计划管理   4711篇
经济学   6884篇
综合类   980篇
运输经济   88篇
旅游经济   209篇
贸易经济   6485篇
农业经济   694篇
经济概况   3345篇
信息产业经济   45篇
邮电经济   580篇
  2021年   72篇
  2020年   146篇
  2019年   213篇
  2018年   2575篇
  2017年   2355篇
  2016年   1489篇
  2015年   265篇
  2014年   366篇
  2013年   1504篇
  2012年   780篇
  2011年   2402篇
  2010年   2165篇
  2009年   1859篇
  2008年   1909篇
  2007年   2193篇
  2006年   315篇
  2005年   631篇
  2004年   754篇
  2003年   872篇
  2002年   544篇
  2001年   358篇
  2000年   384篇
  1999年   251篇
  1998年   277篇
  1997年   274篇
  1996年   250篇
  1995年   245篇
  1994年   239篇
  1993年   286篇
  1992年   260篇
  1991年   239篇
  1990年   227篇
  1989年   186篇
  1988年   184篇
  1987年   175篇
  1986年   203篇
  1985年   251篇
  1984年   317篇
  1983年   261篇
  1982年   255篇
  1981年   269篇
  1980年   238篇
  1979年   251篇
  1978年   205篇
  1977年   189篇
  1976年   174篇
  1975年   138篇
  1974年   139篇
  1973年   126篇
  1972年   86篇
排序方式: 共有10000条查询结果,搜索用时 968 毫秒
891.
The main question of this paper is how actors in strategic communication constellations deal with seemingly hopeless situations. The thesis presented here is that actors in such situations make a strategic communication play. Basically, this facilitates the continuation of communication. The concept of strategic communication plays is developed theoretically in this paper. It is shown that strategic communication plays come across in direct interpersonal communication as well as in mass medial mediated communication. In the communication-sociological approach, it is used as the theoretical basis of a difference theory and paradoxical term of play based on Bateson (1956, 1985), embedded in the frame analysis of Goffmann (1980). On this basis, two functions of strategic communication plays are worked out. On the one hand, it is an extension of freedom of action and on the other hand increases the probability of sympathy and credibility attributions through self-thematization.  相似文献   
892.
893.
Classic theories of comparative advantage point to factor productivity and factor abundance as determinants of specialization and trade. Likewise, geography and topography can determine trade patterns. Institutions, however, are increasingly seen as important sources of comparative advantage. A global drug prohibition regime implies that institutional quality matters more than traditional sources in the drug trade. This paper theoretically models trade patterns of illicit goods and confirms the role of institutions empirically with respect to the drug trade. In particular, illicit enterprises gain force in countries where resources are scarce, drug enforcement is uncertain, and institutions are weak in absolute terms and relative to neighboring countries. I propose several policy alternatives that emphasize economic opportunity for the poor and institutional quality that complement drug prohibition.  相似文献   
894.
In this paper we assess overall accuracy in survey self-reports on giving to charitable organizations, direction of bias in self-reports, and the influence of this bias on relationships. We compare donations to one specific health charity reported in the Giving in the Netherlands Panel Study 2003 with donations recorded in the database (n =  191). We find that (a) reported donations are significantly higher than recorded donations; (b) reported amounts contributed are correlated very strongly with recorded contributions; (c) differences between amounts reported and amounts recorded are positively related to education, religious affiliation, and the tendency to social desirability, and negatively to household income. This suggests that effects of education are overestimated and effects of income and religious affiliation are underestimated using self-reports on donations rather than archival records.  相似文献   
895.
896.
Mixed methods researchers often neglect the methodological discussion on data in general and process-generated data specifically. Assuming that the advantages and disadvantages of surveys, interviews and observations are well-known, the author discusses when and why researchers should prefer process-generated data to research-elicited data in market sociology. The author then compares four different types of process-generated data (aggregated statistical data, business directories, newspaper articles, engineering literature). For each data type, the author (a) describes the data type, (b) illustrates what kind of information researchers can gain from this data type and (c) discusses the draw-backs and limits of the data. The article concludes with a discussion of what one can learn for mixing methods and market sociology from this example and why primary data might be useful as an alternative data source after all.  相似文献   
897.
Bond laddering is a popular fixed-income investment strategy. The main purpose of this paper is to develop a methodology for determining private investors’ most interest rate risk (IRR)-return-efficient investment horizon for bond ladders (BLs), which are virtually free of credit risk. Two IRR measures of a continuously rolling and homogenous BL (CRHBL) are analytically derived under the assumption that interest rates are martingales. The first measure is the modified duration, which assumes a flat term structure of interest rates. However, this assumption is not fully supported by the empirical data and, thus, an additional IRR measure is proposed. Under each of these two measures, the ratios between the annual return in excess of the demand deposit rate and IRR of CRHBLs with different investment horizons are calculated. As expected, CRHBLs with rather low IRR are most risk-return-efficient. The results for the theoretical CRHBLs also apply to “real-world” discrete BLs. Thus, the proposed methodology can help private investors construct IRR-return-efficient discrete BLs.  相似文献   
898.
899.
Are directors’ dealings reports informative for outside investors? We analyze short-term announcement effects for 2782 companies from eight European countries between January 2003 and December 2009. We find significant announcement effects in four out of eight countries after directors’ dealings reports have been disclosed. For most countries, the magnitude of the announcement effect depends on transaction size, firm size, book-to-market ratio, and multiple trades by different insiders on the same trading day. The results are stronger for purchases than for sales. For France, Ireland, and Sweden, we find tentative evidence that the corporate position of an insider is connected to the size of the announcement effect.  相似文献   
900.
Virtual consumption involves consuming virtual goods in cyberspace. Virtual consumption activities are evolving into an essential activity in social virtual worlds. Despite the growing importance of this activity, little research examines this phenomenon. The current study investigates the fundamental question of how users understand the consumption of virtual goods. Using the theory of social representations and core-periphery analysis, this study elicits and analyzes the social representation of virtual consumption. Study participants are 154 Second Life users. Results identify 32 concepts and relationships representing the collective perceptions of virtual consumption in this social virtual world. Social representation map interpretations point to several key themes that provide a foundation for future investigations of virtual economy consumption behavior.  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