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   31204篇
  免费   402篇
  国内免费   1篇
财政金融   5359篇
工业经济   1974篇
计划管理   4986篇
经济学   7056篇
综合类   676篇
运输经济   108篇
旅游经济   223篇
贸易经济   6954篇
农业经济   714篇
经济概况   2936篇
信息产业经济   45篇
邮电经济   576篇
  2021年   94篇
  2020年   175篇
  2019年   226篇
  2018年   2506篇
  2017年   2275篇
  2016年   1462篇
  2015年   282篇
  2014年   372篇
  2013年   1511篇
  2012年   836篇
  2011年   2359篇
  2010年   2194篇
  2009年   1946篇
  2008年   1848篇
  2007年   2249篇
  2006年   440篇
  2005年   677篇
  2004年   759篇
  2003年   832篇
  2002年   581篇
  2001年   344篇
  2000年   350篇
  1999年   271篇
  1998年   298篇
  1997年   261篇
  1996年   277篇
  1995年   235篇
  1994年   244篇
  1993年   225篇
  1992年   281篇
  1991年   259篇
  1990年   206篇
  1989年   189篇
  1988年   175篇
  1987年   209篇
  1986年   223篇
  1985年   307篇
  1984年   327篇
  1983年   296篇
  1982年   262篇
  1981年   254篇
  1980年   254篇
  1979年   267篇
  1978年   176篇
  1977年   171篇
  1976年   123篇
  1975年   154篇
  1974年   124篇
  1973年   108篇
  1971年   88篇
排序方式: 共有10000条查询结果,搜索用时 312 毫秒
901.
902.
While the literature is rich with studies on the identification of alternative types of learning processes that might exist in the real world, the identification of the determinants of the structural changes in regional learning processes is still an underexplored research field in regional innovation theories. This paper proposes the concept of regional learning paradigms and trajectories to study how alternative and more advanced learning processes arise in a region, and highlights the evolutionary path-creation strategies enabling a paradigmatic jump. By taking into consideration also learning modes typical of peripheral or declining industrial areas, generally left aside in previous theories, this new conceptual approach allows us to understand how more complex learning and innovation processes can emerge in all types of regions. From these reflections, spontaneous processes or policy recommendations to catch-up in the innovation ladder are highlighted for each type of region.  相似文献   
903.
Sociologists of religion have long been interested in the interaction between religious pluralism and religious vitality. Previous empirical studies approach this theme by drawing on data of denominational participation rates across geographical units, investigating the property of association between the quantity of one minus the Herfindahl–Hirschman Index (religious pluralism), and the total religious participation rate (religious vitality). However, this association could be theoretically spurious. Taking advantage of the median’s statistical property of being less sensitive to the variations of extreme values, this study proposes to apply the median instead of the arithmetic summation of religious participation rates to measure geographical-unit-level religious vitality. This method is illustrated by analyzing the New York State census of religion 1865 and the U.S. county survey 1990.  相似文献   
904.
Portrayals of women and minorities advertising have long been of interest to advertising scholars. While research has found that the overall representation of these groups has increased, some stereotypes persist, and so do questions about the quality and prominence of portrayals. This study examines portrayals of minorities and women in Super Bowl advertising, the main “pop culture” showcase for US advertising. A content analysis of 10 years of Super Bowl ads is conducted and a multinomial logit regression model is employed to delve deeper into the content analysis results. Findings show that while the overall representation of women and various minority groups is strong, a deeper analysis shows that these groups are seldom depicted as primary characters by themselves and that some subtle stereotypes persist. We also find that ads featuring female principal characters are more likely to feature home settings, sexual appeals, emotional messages, and music as a major element and that it is less likely for female (vs. male) celebrities to be used. Minority principal characters are more likely to be celebrities and be included in ads with music or for technical products but are less likely to be included in ads featuring corporate social responsibility messages.  相似文献   
905.
906.
907.
A drone industry has emerged in the US, initially funded almost exclusively for military applications. There are now also other uses both governmental and commercial (in the US and abroad). Many military drones are still being made, however, especially for surveillance and targeted killings. Regarding the latter, this essay calls into question their legality and morality. It recognizes that the issues are complex and controversial, but less so as to the killing of non-combatant civilians. The government using drones for targeted killings maintains secrecy and appeals to non-traditional justifications. Most scholars who assess these killer drone practices support citizen immunity, either by favoring a modified just war theory that prioritizes civilians’ right to life or by challenging official deviations from applicable laws. They accordingly declare such killing immoral if not a war crime. The manufacturers of these killer drones are not themselves the killers, but they are abetters, i.e., sine qua non facilitators. So, I argue that any company concerned about its corporate social responsibility should cease manufacturing them.  相似文献   
908.
With the emergence of environmental sustainability and green business management, increasing demands have been made on businesses in the areas of environmental corporate social responsibility (ECSR). Furthermore, the influence of ECSR on green capital investment, environmental performance, and business competitiveness has also been the subject of attention from enterprises. However, in previous studies, the mediating role of green information technology (IT) capital in the relationship between ECSR, environmental performance, and business competitiveness, has not been investigated by researchers. In order to bridge this gap in the ECSR literature, this study aims to examine the influence of ECSR on green IT capital, and the consequent effect of green IT capital on environmental performance and business competitiveness. Data were collected from 358 companies from the top 1000 manufacturers in Taiwan. The results confirmed that ECSR has significant positive effects on green IT human capital, green IT structural capital, and green IT relational capital. Green IT structural capital and green IT relational capital have positive effects on environmental performance and business competitiveness, and environmental performance has a positive effect on business competitiveness. In addition, green IT structural capital and green IT relational capital have partial mediating effects on ECSR, environmental performance, and business competitiveness. The implications and suggestions for future research are discussed.  相似文献   
909.
910.
The ethnically homogeneous middleman groups (EHMGs), which are informal trading networks, are ubiquitous in less-developed economies where the legal infrastructure for contract enforcement is not well developed. This paper develops a formal model of social interaction among members of the EHMG as well as in more general situations in a multi-ethnic or multi-cultural society consisting of identifiable ethnic or linguistic groups. Behavioral patterns are transmitted between generations and altered via imitation in social contacts. The model demonstrates how different discriminatory behavioral patterns can evolve and persist over time. One result is that the trust between such groups can increase due to a higher frequency of inter-group contacts. In concluding the paper, we speculate about how the model can be expanded to include changes in legal structures, especially contract law. This could lead to an increase in the trust between the different groups.  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