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   9755篇
  免费   257篇
  国内免费   1篇
财政金融   1768篇
工业经济   814篇
计划管理   1694篇
经济学   2184篇
综合类   225篇
运输经济   46篇
旅游经济   135篇
贸易经济   1548篇
农业经济   397篇
经济概况   1171篇
信息产业经济   1篇
邮电经济   30篇
  2020年   111篇
  2019年   144篇
  2018年   184篇
  2017年   217篇
  2016年   201篇
  2015年   138篇
  2014年   191篇
  2013年   885篇
  2012年   280篇
  2011年   289篇
  2010年   267篇
  2009年   299篇
  2008年   276篇
  2007年   258篇
  2006年   207篇
  2005年   189篇
  2004年   187篇
  2003年   192篇
  2002年   153篇
  2001年   203篇
  2000年   210篇
  1999年   175篇
  1998年   173篇
  1997年   203篇
  1996年   175篇
  1995年   179篇
  1994年   169篇
  1993年   168篇
  1992年   195篇
  1991年   190篇
  1990年   152篇
  1989年   152篇
  1988年   125篇
  1987年   123篇
  1986年   128篇
  1985年   180篇
  1984年   156篇
  1983年   171篇
  1982年   137篇
  1981年   170篇
  1980年   141篇
  1979年   161篇
  1978年   135篇
  1977年   119篇
  1976年   125篇
  1975年   106篇
  1974年   102篇
  1973年   85篇
  1972年   65篇
  1971年   59篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
62.
This paper analyzes countertrade as a special case of a customs union in which the countertrade agreement gives rise (as in customs union theory) to both trade-creating and trade-diverting effects. The net effects on welfare are ambiguous. A detailed case study from Egypt and brief examples from other countries illustrate the relevance of this interpretation .  相似文献   
63.
The maritime industry provides an interesting case study of the design and implementation of drug-testing programs in the transportation industry during the 1980s. It is clear that such programs were designed and implemented less because of empirical evidence of safety problems than for political reasons. The results in the maritime industry are indicative of a program that is expensive to operate, intrusive with regard to employee privacy, and which will have little or no impact on safety. Focusing such programs on the issue of impairment rather than on the issue of drug usage per se is likely to improve the outcome of the programs. Although, despite common belief, there is little evidence that drug usage or the “drug problem” in U.S. society as a whole had gotten worse in the preceding years (Schonsheck, 1989, 250–251).  相似文献   
64.
The idea of judo economics, building on analogies with the sport of judo, has been around for at least 20 years. But taking these ideas further to judo strategy means that a framework of strategic principles can be developed to help companies put stronger opponents on the mat.  相似文献   
65.
66.
67.
Agricultural policy reform has been an important source of change in the Chinese agricultural sector. The reforms led to productivity growth and helped China to pursue its self-sufficiency goal especially in the grain sector. In order to analyze whether observable productivity growth stems from technologically induced components or from the market induced parts, a multi-input–multi-output model is derived by using an econometric distance function framework. A decomposition allows to distinguish allocative effects, scale effects, technological change, and technical efficiency change. Data on farms in Zhejiang from 1986 to 2000 are used to analyze the impact of policy reform.  相似文献   
68.
69.
In-depth data analysis plus statistical modeling can produce inferentialcausal models. Their creation thus combines aspects of analysis by close inspection,that is, reason analysis and cross-tabular analysis, with statistical analysis procedures,especially those that are special cases of the generalized linear model (McCullaghand Nelder, 1989; Agresti, 1996; Lindsey, 1997). This paper explores some of the roots of this combined method and suggests some new directions. An exercise clarifies some limitations of classic reason analysis by showing how the cross tabulation of variables with controls for test factors may produce better inferences. Then, given the cross tabulation of several variables, by explicating Coleman effect parameters, logistic regressions, and Poisson log-linear models, it shows how generalized linear models provide appropriate measures of effects and tests of statistical significance. Finally, to address a weakness of reason analysis, a case-control design is proposed and an example is developed.  相似文献   
70.
Time-Based Management of the New Product Development Process   总被引:3,自引:0,他引:3  
This study explored the problem of compressing new product development by focusing on the specific phases of the innovation process. These phases manifest significant qualitative differences that require attention for understanding the complexities of accelerating new product development. Based on data from 35 high-technology companies, Necmi Karagozoglu and Warren Brown identified several different acceleration methods. Results revealed unexpected and at times inconsistent insights than those reflected in the case study and anecdotally based literature, and implied also that some of the well documented approaches to successful new product development need to be replaced with their time-based versions.  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