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   1244篇
  免费   60篇
财政金融   255篇
工业经济   113篇
计划管理   247篇
经济学   293篇
综合类   3篇
运输经济   11篇
旅游经济   11篇
贸易经济   215篇
农业经济   44篇
经济概况   111篇
信息产业经济   1篇
  2024年   4篇
  2023年   15篇
  2022年   10篇
  2021年   14篇
  2020年   25篇
  2019年   52篇
  2018年   53篇
  2017年   40篇
  2016年   37篇
  2015年   28篇
  2014年   49篇
  2013年   147篇
  2012年   43篇
  2011年   55篇
  2010年   67篇
  2009年   43篇
  2008年   39篇
  2007年   51篇
  2006年   40篇
  2005年   49篇
  2004年   47篇
  2003年   30篇
  2002年   40篇
  2001年   25篇
  2000年   18篇
  1999年   34篇
  1998年   33篇
  1997年   22篇
  1996年   20篇
  1995年   23篇
  1994年   11篇
  1993年   19篇
  1992年   11篇
  1991年   8篇
  1990年   4篇
  1989年   7篇
  1988年   8篇
  1987年   4篇
  1986年   3篇
  1985年   10篇
  1984年   14篇
  1983年   11篇
  1982年   4篇
  1981年   8篇
  1980年   6篇
  1979年   6篇
  1978年   5篇
  1977年   4篇
  1975年   2篇
  1973年   2篇
排序方式: 共有1304条查询结果,搜索用时 15 毫秒
991.
992.
Different approaches to forecasting the volatility associated with the credit spreads on Yen Eurobonds are investigated. The actual volatility, historical volatility and estimated conditional volatility on spreads derived from a regression-based model with a GARCH and ARMA specification are compared within an adaptation of Black’s (J. Finance, 31, 1976, 361–367) option-pricing model. Surprisingly, the regression forecast over a medium forecasting horizon suggests that historic volatility provides the better forecast. The implications of these results for volatility forecasting and credit spread modelling are also discussed.JEL Classification: C32; G15  相似文献   
993.
Momentum and Autocorrelation in Stock Returns   总被引:7,自引:0,他引:7  
This article studies momentum in stock returns, focusing onthe role of industry, size, and book-to-market (B/M) factors.Size and B/M portfolios exhibit momentum as strong as that inindividual stocks and industries. The size and B/M portfoliosare well diversified, so momentum cannot be attributed to firm-or industry-specific returns. Further, industry, size, and B/Mportfolios are negatively autocorrelated and cross-seriallycorrelated over intermediate horizons. The evidence suggeststhat stocks covary "too strongly" with each other. I argue thatexcess covariance, not underreaction, explains momentum in theportfolios.  相似文献   
994.
In the usual consumption portfolio problem, lifetime utility is assumed to be time-additive. This assumption has been criticized for failing to capture important intertemporal dependencies in utility such as intertemporal risk aversion and habit formation. This paper studies the consumption portfolio problem for a class of intertemporally dependent utility functions.  相似文献   
995.
Over the period 1972-1986, the US business cycle was strongly correlated with the business cycle in the rest of the industrialized world. Over the period 1986-2000, international co-movement was much weaker (real regionalization). At the same time, US international asset trade has increased significantly ( financial globalization). We first document these phenomena in detail and then argue that they are related. In particular, we present a model in which financial globalization occurs endogenously in response to less correlated real shocks. Financial globalization, by enhancing cross-border capital flows, further reduces the international correlations in GDP and factor supplies. We find that both less correlated shocks and the endogenous change in international financial markets are needed to quantitatively account for the observed changes in the international business cycle.  相似文献   
996.
This study investigates the extent to which the coefficients of housing price equations are stable over time. Using annual data from 1959 to 1979 for a large neighbourhood in Vancouver, British Columbia, a series of twenty-four housing price equations is estimated. The estimated coefficients exhibit substantial instability over the period. Further, prediction errors are generally minimized for a given year when the coefficients estimated for that year are used to predict. The results strongly suggest that such equations should be recalibrated each year.  相似文献   
997.
The poor representation of uncertainty in the urban transportation planning process can lead to excessively large and permanent facilities. Such inflexible facilities and systems may condition and severely constrain options available to future generations for organizing the production, consumption, and distribution of goods and services. The relationship between facility size and permanence and flexibility has received too little recognition in practice and too little attention in research. This paper calls for increased to provide policy makers and practitioners with a greater understanding of the consequences of the present approach and the advantages and disadvantages of more flexible approaches.  相似文献   
998.
Food production policy in Nigeria is now oriented towards large scale commercial production. The Federal Government proposes 20000 hectares of public cassava farming in all 19 states and in the Abuja capital territory. The National Grains Board and the National Root Crops Production Company are establishing large farms in their operational zones. The Nigerian Agricultural and Cooperative Bank is loaning millions of naira to individual private farmers to encourage them to establish large farms. Virtually every state government has its Agricultural Development Corporation directly involved in agricultural production on a large scale. It is presumed that the smallholder system on which Nigeria currently depends is inefficient and could not be relied upon to achieve the necessary increases in production.  相似文献   
999.
1000.
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