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   35853篇
  免费   505篇
财政金融   6598篇
工业经济   2590篇
计划管理   5964篇
经济学   8097篇
综合类   677篇
运输经济   270篇
旅游经济   555篇
贸易经济   5611篇
农业经济   1733篇
经济概况   4173篇
信息产业经济   3篇
邮电经济   87篇
  2021年   239篇
  2020年   455篇
  2019年   707篇
  2018年   719篇
  2017年   774篇
  2016年   766篇
  2015年   533篇
  2014年   821篇
  2013年   3699篇
  2012年   1093篇
  2011年   1198篇
  2010年   1042篇
  2009年   1122篇
  2008年   1099篇
  2007年   926篇
  2006年   843篇
  2005年   759篇
  2004年   689篇
  2003年   726篇
  2002年   671篇
  2001年   758篇
  2000年   748篇
  1999年   631篇
  1998年   702篇
  1997年   669篇
  1996年   639篇
  1995年   576篇
  1994年   574篇
  1993年   590篇
  1992年   598篇
  1991年   589篇
  1990年   538篇
  1989年   418篇
  1988年   417篇
  1987年   422篇
  1986年   414篇
  1985年   581篇
  1984年   621篇
  1983年   564篇
  1982年   512篇
  1981年   529篇
  1980年   496篇
  1979年   497篇
  1978年   405篇
  1977年   351篇
  1976年   339篇
  1975年   282篇
  1974年   278篇
  1973年   265篇
  1972年   177篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
There is an acknowledged need for valid and reliable injury scores, suitable for use at the population level, which can accurately predict the long-term outcome of injury. The objective was to quantify the extent to which the abbreviated injury severity score (AIS) and the functional capacity index score (FCI) predict use of health services in the 12 months following an injury event. A cohort of injured people (ICD-9-CM 800-995) aged 18 - 64 years was identified from Manitoba hospital discharge abstracts from January 1988 to December 1991. For each member of the cohort whose injuries could be mapped to an abbreviated injury scale unique identifier, a maximum AIS (maxAIS) and a maximum FCI (maxFCI) were obtained. The cohort was linked with hospital discharge abstracts, physicians' claims and deaths from the population registry for the 12 months following injury. Negative binomial regression was used to model the relationships between the severity scores and the three outcome measures, while controlling for potential confounding variables. In total, 20 677 (97%) eligible cases were identified, of which 16 834 (81%) could be assigned a maxAIS and 15 823 (77%) a maxFCI. MaxAIS and maxFCI were significantly associated with total days in hospital following injury, but explained little of the variation in any of the health service use outcome variables (maxAIS, partial pseudo r2 ranging from < 0.001 to 0.041; and maxFCI, partial pseudo r2 ranging from < 0.001 to 0.018). It was concluded that anatomical damage is only partly responsible for long-term injury outcome. Additional variables would need to be included in predictive models of health outcomes of injury before these models could be reliable.  相似文献   
992.
There are several teaching techniques adopted by faculty in order to provide information to students in the most effective manner. One of the relatively new teaching techniques is known as team-teaching. It has been observed that over the recent years this form of teaching has been gaining increasing interest and popularity among academicians. Nevertheless, there seems to be a great deal of confusion associated with team-teaching format. This paper attempts to clarify the various definitions and concerns that are associated with this form of teaching. The pros and cons of this form of teaching are discussed in detail.  相似文献   
993.
Understanding and quantifying the determinants of the number of sectors or firms exporting in a given country is of relevance for the assessment of trade policies. Estimation of models for the number of exporting sectors, however, poses a challenge because the dependent variable has both a lower and an upper bound, implying that the partial effects of the explanatory variables on the conditional mean of the dependent variable cannot be constant. We argue that ignoring these bounds can lead to erroneous conclusions and propose a flexible specification that accounts for the doubly-bounded nature of the dependent variable. We empirically investigate the problem and the proposed solution, finding significant differences between estimates obtained with the proposed estimator and those obtained with standard approaches.  相似文献   
994.
The relationship between unethical peer behavior and observers?? unethical behavior traditionally has been examined from a social learning perspective. We employ two additional theoretical lenses, social identity theory and social comparison theory, each of which offers additional insight into this relationship. Data from 600 undergraduate business students in two universities provide support for all the three perspectives, suggesting that unethical behavior is influenced by social learning, social identity, and social comparison processes. Implications for managers and future research are discussed.  相似文献   
995.
This article applies inductive analytic techniques to identify and elaborate on two recurring themes that underpin the core puzzle of entrepreneurship research — where entrepreneurial opportunities come from. The first theme is the unique role of imprinting, or the profound influence of social and historical context in constraining the perceptual apparatus of entrepreneurs and delimiting the range of opportunities for innovation available to them. Second, our analysis offers insight into the counterbalancing role of reflexivity, operating at both individual and collective levels of analysis, in generating the ability of entrepreneurs to overcome the constraints of imprinting. These insights are based on a thematic review of the nine studies that comprise this special issue on qualitative research. The nine studies, individually and each in their own way, offer key insights into how we might better understand the emergence of entrepreneurial opportunity.  相似文献   
996.
Using 10 years of publication data (1999–2008) from 10 leading business ethics journals, we examine global patterns of business ethics research and contributing institutions and scholars. Although U.S. academic institutions continue to lead in the contributions toward business ethics research, Asian and European institutions have made significant progress. Our study shows that business ethics research output is closely linked to the missions of the institutions driven by their values or religious belief. An additional analysis of the productivity of each highly ranked institution suggests that business ethics research is highly concentrated in a limited number of eminent scholars within each institution.  相似文献   
997.
998.
Ukraine’s recent elections revealed deep divisions between eastern regions, which favored central economic planning, and western regions, which preferred more free market reforms. This study compares polyclinics in Ukraine to see if the inflexibility of Soviet-style planned economies results in lower economic efficiency in eastern regions. Using data from two geopolitical regions, Data Envelopment Analysis (DEA) scores for polyclinic efficiencies are modeled as a function of demographic and economic determinants. Surprisingly, results indicate that polyclinics in western Ukraine are less efficient. Possible explanations, including case mix intensity, responsiveness to local preferences, physician entrepreneurial behavior and a legacy of inequitable funding, are discussed.
Vivian G. ValdmanisEmail:
  相似文献   
999.
1000.
Building on existing research into sound symbolism and cross‐modal correspondences, this article proposes that cross‐modal correspondences—systematic mappings between different sensory modalities—can be used to communicate nonmusical, low‐level sensory properties such as basic tastes through music. A series of three experiments demonstrates that cross‐modal correspondences enable people to systematically encode basic taste properties into parameters in musical space (Experiment 1), and that they are able to correctly decode basic taste information embedded in complex musical compositions (Experiments 2 and 3). The results also suggest some culture‐specificity to these mappings, given that decoding performance, while still above chance levels, was lower in Indian participants than in those from the United States (Experiment 3). Implications and potential applications of these findings are discussed.  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