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   20587篇
  免费   121篇
财政金融   4235篇
工业经济   1538篇
计划管理   3643篇
经济学   4129篇
综合类   227篇
运输经济   154篇
旅游经济   299篇
贸易经济   3314篇
农业经济   915篇
经济概况   2238篇
信息产业经济   2篇
邮电经济   14篇
  2021年   120篇
  2020年   278篇
  2019年   357篇
  2018年   429篇
  2017年   424篇
  2016年   418篇
  2015年   281篇
  2014年   440篇
  2013年   2200篇
  2012年   555篇
  2011年   655篇
  2010年   588篇
  2009年   623篇
  2008年   589篇
  2007年   534篇
  2006年   509篇
  2005年   410篇
  2004年   420篇
  2003年   424篇
  2002年   453篇
  2001年   417篇
  2000年   425篇
  1999年   440篇
  1998年   415篇
  1997年   375篇
  1996年   333篇
  1995年   334篇
  1994年   337篇
  1993年   345篇
  1992年   359篇
  1991年   348篇
  1990年   284篇
  1989年   261篇
  1988年   245篇
  1987年   233篇
  1986年   252篇
  1985年   355篇
  1984年   351篇
  1983年   340篇
  1982年   296篇
  1981年   276篇
  1980年   259篇
  1979年   228篇
  1978年   233篇
  1977年   228篇
  1976年   176篇
  1975年   196篇
  1974年   162篇
  1973年   144篇
  1972年   109篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
This research paper aims at analyzing the impact of servitization on networking in manufacturing industries. Based on a cluster analysis, four types of manufacturers have been identified representing different stages of servitization. By multifactorial regressions, the impact of servitization on service networking has been investigated. Servitization is positively linked with increasing service networking activities of manufacturing companies. This finding implies that problems in realizing service networking do not prevent servitizing manufacturers from establishing inter-firm collaboration for service operations management issues. However, the results indicate that the mere existence of service networks can not guarantee success in servitizing.  相似文献   
62.
63.
The question of how entrepreneurship relates to income mobility is cogent given the current public debate about the sources of income inequality and mobility in United States society. We examine how experience with entrepreneurship has affected an individual's place in the earnings distribution. Our basic tack is to follow individuals' positions in the income distribution over time, and to see how their mobility (or lack thereof) was affected by involvement with entrepreneurship. Our main finding is that for low-income individuals there is some merit to the notion that the self-employed moved ahead in the earnings distribution relative to those who remained wage earners. On the other hand, for those at the upper end of the earnings distribution, those who became self-employed often advanced less in the earnings distribution than their salaried counterparts.  相似文献   
64.
Burning bluegrass seed stubble is an important production practice that, among other benefits, increases production and stand life of this perennial crop. Despite economic forecasts that higher production costs from the 1996 state ban on seed stubble burning would reduce Washington production by up to 30%, output in the years 1998–2005 was nearly two-thirds higher than in any previous eight-year period. This study seeks to explain why that paradoxical behavior occurred. This study puts forward and systematically tests several hypotheses. The only hypothesis with any support, innovation offsets, is examined by an assessment of contemporaneous innovations and by corroborative statistical evidence.  相似文献   
65.
66.
Unique among developed countries in denying patent protection for pharmaceuticals, Canada modified her laws in 1987 and again in 1993 to meet international standards, thereby permitting her to participate in NAFTA and become a signatory of the TRIPS of the Uruguay Round. Canada's concerns for containing health costs and providing quality health care for all its citizens were important factors in her original position. It was only as a result of international pressure and an alliance between the multinational pharmaceutical firms and the university community in Canada that she offered greater patent protection. The results of these changes had an immediate effect on improving the business environments and significant investments by the multinational pharmaceutical firms have increased substantially since 1987.  相似文献   
67.
This research compares and contrasts three gender identity instruments, the Bem Sex Role Inventory (BSRI), the Personal Attributes Questionnaire (PAQ), and the Sexual Identity Scale (SIS), that have been used in previous investigations of various aspects of consumer behavior. Specifically, it examines the dimensionality and internal reliability of each scale, inter-scale correlations, and the relationship of each scale to biological sex. Results indicate that the gender identity scales consist of several dimensions beyond those typically interpreted as masculinity and femininity. The femininity factors emerging in the three scales tended to be highly correlated, and females scored higher than males on the femininity factors. However, the three masculinity factors were not correlated with one another, and were not as strongly associated with biological sex—females identified with typically masculine traits just as much as males. The implications of these results for using gender identity in consumer research are discussed, and future research opportunities are explored.  相似文献   
68.
This paper applies a novel empirical approach to characterising the horizontal‐ness and vertical‐ness of affiliates based on Yeaple's complex FDI concept. In its simplest form, horizontal‐ness is measured as affiliates’ local sales share while their vertical‐ness is measures as their share of non‐local sourcing of intermediates. Japanese affiliates in most sectors and nations are partly vertical and partly horizontal, but those in North American are far more ‘horizontal’ than those in the EU and Asia. Affiliates became more vertical between 1996 and 2005. A four‐way sales and sourcing split (host, home, regional and RoW) suggests that affiliates act as nodes in regional production networks – especially in Asia. We posit several hypotheses that could be tested with our empirical approach.  相似文献   
69.
This study examines whether differences in financial performance exist for investment trusts which base their portfolio selection primarily on an ethical screen, compared to indexes which incorporate a broader spectrum of investments. Results indicate that on a risk-adjusted basis there is an insignificant difference in the financial performance of these trusts against three common market benchmarks. However as to the extent of the directional effect, there does exist slightly superior financial performance by ethical trusts against their respective industry average indexes, but an underperformance against a smaller company's index and the market as a whole. The lack of a distinct advantage in the short to medium term for applying an ethical screen, may in part be due to the recent development of ethical investments in Australia. Stronger performances by older ethical investment trusts may indicate superior returns are more likely to occur over a longer term.  相似文献   
70.
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