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   27616篇
  免费   593篇
  国内免费   1篇
财政金融   5376篇
工业经济   2012篇
计划管理   4140篇
经济学   6087篇
综合类   439篇
运输经济   209篇
旅游经济   497篇
贸易经济   4268篇
农业经济   1389篇
经济概况   3736篇
信息产业经济   1篇
邮电经济   56篇
  2021年   146篇
  2020年   277篇
  2019年   464篇
  2018年   555篇
  2017年   571篇
  2016年   568篇
  2015年   327篇
  2014年   610篇
  2013年   2902篇
  2012年   816篇
  2011年   891篇
  2010年   740篇
  2009年   847篇
  2008年   816篇
  2007年   726篇
  2006年   663篇
  2005年   571篇
  2004年   581篇
  2003年   549篇
  2002年   594篇
  2001年   518篇
  2000年   533篇
  1999年   521篇
  1998年   470篇
  1997年   481篇
  1996年   472篇
  1995年   413篇
  1994年   424篇
  1993年   448篇
  1992年   467篇
  1991年   459篇
  1990年   386篇
  1989年   356篇
  1988年   329篇
  1987年   354篇
  1986年   358篇
  1985年   545篇
  1984年   494篇
  1983年   466篇
  1982年   458篇
  1981年   415篇
  1980年   447篇
  1979年   371篇
  1978年   333篇
  1977年   308篇
  1976年   248篇
  1975年   284篇
  1974年   232篇
  1973年   223篇
  1972年   148篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
111.
112.
113.
Optimal investment rules are developed for a producer agency investing in domestic-market generic advertising, export market promotion, and cost-of-production-reducing research. These rules are derived assuming either maximization of producers' surplus or social surplus. The form of the optimality rules differs according to which objective is pursued. Fixed producer agency budgets are also allowed by incorporating a constraint limiting total expenditure on the three activities. Addition of such a constraint substantially alters the structure of the optimal investment rules. Differences in these rules highlight the importance of accounting for the financing mechanism when modeling optimal checkoff fund investment decisions. Optimality rules are simulated using data for the Canadian beef sector. Results suggest historic underinvestment in domestic-market generic advertising but overinvestment in export market promotion. Sensitivity of simulation results underscores the difficulty in assessing optimality of historic producer investment in cost-of-production-reducing research.  相似文献   
114.
This paper analyzes the dynamic relationship between primary and secondary mortgage markets and the short-term and long-term market interest rates. Using a series of monthly data on fixed rate mortgage rates and GNMA rates, we explore the dependence and speed of adjustment in these primary and secondary mortgage rates to each other as well as to the long and short-term government rates. The results indicate that residential mortgage rates in general, appear to follow the long-term rate and are not very sensitive to movements in the short-term interest rate.  相似文献   
115.
116.
117.
This paper uses a unique data set from 1957 to examine whether or not Blue Cross and Blue Shield suffered from an adverse selection death spiral after for-profit commercial insurance companies entered the market for health insurance. Results suggest that moving to experience rating may have helped the Blues counteract adverse selection in the group health insurance market. Adverse selection posed a greater problem for the Blues in the market for individual health insurance, possibly because of differences in the way the Blues screened potential enrollees relative to commercial insurance companies.  相似文献   
118.
This paper analyses the cost of capital of firms with foreign equity listings. Our purpose is to shed light on the question whether international and domestic asset pricing models yield a different estimate of the cost of capital for cross‐listed stocks. We distinguish between (i) the multifactor ICAPM of Solnik (1979) and Sercu (1980) including both the global market portfolio and exchange rate risk premia and (ii) the single factor domestic CAPM. We test for the significance of the cost of capital differential in a sample of 336 cross‐listed stocks from nine countries in the period 1980–99. Our hypothesis is that the cost of capital differential is substantial for firms with international listings, as these are often large multinationals with a strong international orientation. We find that the asset pricing models yield a significantly different estimate of the cost of capital for only 12% of the cross‐listed companies. The size of the cost of capital differential is around 50 basis points for the US, 80 basis points for the UK and 100 basis points for France.  相似文献   
119.
120.
Using Turkish industry-level data from 1983 to 1990, we find that politically organized industries receive both higher protection and promotion than unorganized ones. Tariff rates are decreasing (increasing) in the import-penetration ratio and the absolute value of the import-demandelasticity for organized (unorganized) industries. Subsidy rates are decreasing (increasing) in the output-supply elasticity for organized (unorganized) industries. The results are consistent with the predictions of the Grossman–Helpman model and its extension in this paper. The mix of protection and promotion is inversely related to the ratio of their respective marginal deadweight cost measures.  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