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   17729篇
  免费   339篇
  国内免费   1篇
财政金融   3352篇
工业经济   1311篇
计划管理   2968篇
经济学   3654篇
综合类   164篇
运输经济   125篇
旅游经济   246篇
贸易经济   2842篇
农业经济   998篇
经济概况   2365篇
信息产业经济   1篇
邮电经济   43篇
  2020年   177篇
  2019年   261篇
  2018年   365篇
  2017年   334篇
  2016年   353篇
  2015年   220篇
  2014年   362篇
  2013年   1692篇
  2012年   503篇
  2011年   520篇
  2010年   441篇
  2009年   520篇
  2008年   520篇
  2007年   447篇
  2006年   439篇
  2005年   378篇
  2004年   376篇
  2003年   382篇
  2002年   406篇
  2001年   350篇
  2000年   363篇
  1999年   349篇
  1998年   309篇
  1997年   288篇
  1996年   299篇
  1995年   270篇
  1994年   274篇
  1993年   276篇
  1992年   283篇
  1991年   272篇
  1990年   274篇
  1989年   244篇
  1988年   208篇
  1987年   213篇
  1986年   242篇
  1985年   344篇
  1984年   311篇
  1983年   278篇
  1982年   269篇
  1981年   273篇
  1980年   265篇
  1979年   244篇
  1978年   234篇
  1977年   232篇
  1976年   193篇
  1975年   195篇
  1974年   163篇
  1973年   151篇
  1972年   135篇
  1971年   108篇
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
71.
I have argued that for the period from 1661 to 1850, patent data in England were consistent in that no official changes in methods and standards of issuance occurred. Book data on titles published on farming production methods were similarly consistent from 1523 to the mid-19th century because the market for books developed gradually and the technology of printing was not substantially changed until the mid-19th century.My main point is that data on output of titles of books on farming productive techniques in England are useful measures of technological change. Books did have information on good production methods and could express productive ideas where a patent may not be issued. Further, the literacy rate of farmers was high so that books were likely an important source of ideas on farming production methods. Finally, the fluctuations in the book data were highly related to the fluctuations in the patent data, suggesting that a common set of factors caused those fluctuations. The high correlations between the detrended book and patent data indicate that if we accept patenting as a useful measure of technology we may also accept book title output of a technical nature as a good measure of technical change.I used the data for a simple analysis of the trend growth rate of agricultural technology in England from 1551 to 1850. While there is limited evidence to show that the subperiod 1651–1750 saw a slowing in the trend of development of farming technology, I argue that a division of the entire period into subperiods is too simplistic. A more fruitful approach would be an analysis of the underlying forces that determined the trend of development of the technology of English agriculture.The next step is an analysis of the forces that influenced technological development of English farming. From an economic point of view, market forces play an important role in influencing technology. Because such an analysis deserves careful consideration, I leave that to another paper (see Sullivan and Simon, 1983).  相似文献   
72.
73.
74.
Conclusions Unlike McKenzie and Tullock, we do not know how personsshould treat their bodily organs or what is an ideal exit. That depends upon their utility goals, which are defined in output terms specific to the decision maker. We contend that the body is an input into the utility production process, and therefore, as with any input, it must be maintained and repaired at a level consistent with the output goals for maximization of utility. Thus, from this framework, it is quite consistent for a person to die with healthy organs without any thought of belief in reincarnation or the desire to bequeath one's bodily organs to others, or religious values. Self interest is all that must prevail.Also, the fact that there are interrelationships between the organs in the system, and at points these relationships take on fixed factor characteristics such that reduced levels of operation in one organ can create disorientation or coma or damage to other organs, means that the body cannot die as M-T suggest. Zero capacity for all organs at death is a technical impossibility as well as being inconsistent with the output goals of utility maximizers.  相似文献   
75.
76.
Valuation of SGARAs IN THE Wine Industry: Time for Sober Reflection   总被引:1,自引:0,他引:1  
The application of AASB 1037 Self Generating and Regenerating Assets provides little guidance to the commercial performance of winemakers. The valuation of grapevines essentially requires the valuation of a segment of a business (vineyards), from which is deducted the value of associated infrastructure. Grapevines are reported at a fictional "net market value" even though they cannot be bought or sold. The combination of recognising revaluation increments as distributable profits through the valuation of grapevines at "net market value", and the subsequent "amortisation" of those revaluation increments over the useful lives of the grapevines, creates a reporting maze which is more likely to confuse than inform.  相似文献   
77.
78.
79.
80.
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