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   37617篇
  免费   892篇
  国内免费   1篇
财政金融   7166篇
工业经济   2922篇
计划管理   5900篇
经济学   8273篇
综合类   505篇
运输经济   284篇
旅游经济   683篇
贸易经济   5730篇
农业经济   1861篇
经济概况   5125篇
信息产业经济   2篇
邮电经济   59篇
  2021年   236篇
  2020年   407篇
  2019年   617篇
  2018年   808篇
  2017年   780篇
  2016年   792篇
  2015年   477篇
  2014年   837篇
  2013年   3880篇
  2012年   1141篇
  2011年   1220篇
  2010年   1081篇
  2009年   1213篇
  2008年   1120篇
  2007年   965篇
  2006年   878篇
  2005年   746篇
  2004年   775篇
  2003年   736篇
  2002年   771篇
  2001年   712篇
  2000年   750篇
  1999年   698篇
  1998年   640篇
  1997年   668篇
  1996年   632篇
  1995年   573篇
  1994年   576篇
  1993年   639篇
  1992年   618篇
  1991年   633篇
  1990年   531篇
  1989年   493篇
  1988年   477篇
  1987年   471篇
  1986年   496篇
  1985年   719篇
  1984年   678篇
  1983年   636篇
  1982年   575篇
  1981年   534篇
  1980年   601篇
  1979年   504篇
  1978年   419篇
  1977年   403篇
  1976年   326篇
  1975年   355篇
  1974年   288篇
  1973年   289篇
  1972年   202篇
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
51.
This paper explores the methodology of sectoral productivity growth measurement within the framework of input-output analysis. A method which ensures that sectoral productivity growth rates are consistent with productivity growth rates for the economy as a whole (as well as allowing for external trade) is suggested. New estimates are presented on total factor productivity in UK agriculture using a Tornqvist index procedure. In addition, new estimates of agricultural labour productivity growth are presented, taking account not only of labour employed in agriculture but also of labour employed in ancillary industries on the supply side. The empirical results confirm that part of the labour previously employed on farms has shifted “upstream” to industries providing agriculture with fertilises, machinery and other inputs.  相似文献   
52.
53.
The relaxation of security laws and regulations in emerging markets in the Middle East and North Africa (MENA) provides abundant opportunities for foreign investors. These markets exhibit high-expected returns and substantial volatility. In this paper, we investigate the lead/lag relationship between the MENA countries and regions. We find no market causality or spillover from one country to another in the North Africa region. Our results for the Levant region reveal that there are linkages between stock markets in this region. The results for the Gulf Cooperation Council (GCC) region show that there is more interaction and linkage in the GCC region than in the North Africa and Levant regions. An unexpected result is that UAE's stock market leads all the markets in this region. Finally, we investigate linkages among the three regions. We find that GCC influences the other two regions.  相似文献   
54.
Using a sample of Australian Multi-sector trusts we examine selectivity and market timing performance and extend the analysis to include the relatively new measure of volatility timing. This is of particular relevance to our data set, as high levels of volatility persistence are prevalent in Australia. In addition we consider the stability, asymmetry and seasonality of the various performance and risk measures. A survivorship adjustment procedure is also employed in order to assess the impact of survivorship on selectivity, market timing and volatility timing performance.  相似文献   
55.
Competition, Contractibility, and the Market for Donors to Nonprofits   总被引:1,自引:0,他引:1  
This article investigates theoretically and empirically theeffects of competition for donors on the behavior of nonprofitorganizations. Theoretically, we consider a situation in whichnonprofit organizations use donations to produce some commodity,but the use of donations is only partially contractible. Themain results of the model indicate that an increase in competition(i) decreases the fraction of donations allocated to perquisiteconsumption and (ii) increases the fraction of donations allocatedto promotional expenditures. Moreover, the effects of competitionare magnified by the ability to contract on the use of donations.These hypotheses are tested with data on the expenditures ofnonprofit organizations in a number of subsectors where competitionis primarily local. We use across–metropolitan statisticalareas' variation to measure differences in competition and proxycontractibility by the importance of tangible assets, whichare more easily observed by donors. The estimated effects ofcompetition and contractibility are consistent with our model.  相似文献   
56.
The current progress of electrification in Russia is clearly insufficient compared with G8 countries. At the same time, economy sectors have a high potential for energy saving. The electricity consumption of households depends on their cash income and the growth rate of electricity tariffs.  相似文献   
57.
58.
59.
60.
This article investigates the determinants of real estate investment trusts (REIT) portfolio investment and institutional REIT ownership using multivariate Tobit regressions. We contend that many institutional investors take larger positions in more liquid assets like REIT stocks, as compared with private real estate equities, because of liquidity considerations. Consistent with this contention, we find that liquidity constraints are significantly related to REIT portfolio investment by institutional investors. We also find that institutional investors have different preferences for REIT stocks than do other investors; they generally prefer larger, more liquid REIT stocks.  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