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   30992篇
  免费   315篇
财政金融   5564篇
工业经济   1804篇
计划管理   4809篇
经济学   6907篇
综合类   609篇
运输经济   102篇
旅游经济   223篇
贸易经济   6691篇
农业经济   620篇
经济概况   3351篇
信息产业经济   46篇
邮电经济   581篇
  2023年   73篇
  2021年   85篇
  2020年   191篇
  2019年   254篇
  2018年   2656篇
  2017年   2412篇
  2016年   1563篇
  2015年   286篇
  2014年   434篇
  2013年   1657篇
  2012年   817篇
  2011年   2421篇
  2010年   2206篇
  2009年   1930篇
  2008年   1897篇
  2007年   2212篇
  2006年   394篇
  2005年   646篇
  2004年   753篇
  2003年   863篇
  2002年   527篇
  2001年   340篇
  2000年   339篇
  1999年   293篇
  1998年   316篇
  1997年   263篇
  1996年   232篇
  1995年   219篇
  1994年   235篇
  1993年   241篇
  1992年   262篇
  1991年   252篇
  1990年   200篇
  1989年   181篇
  1988年   165篇
  1987年   163篇
  1986年   180篇
  1985年   237篇
  1984年   253篇
  1983年   244篇
  1982年   211篇
  1981年   194篇
  1980年   168篇
  1979年   167篇
  1978年   156篇
  1977年   133篇
  1976年   123篇
  1975年   139篇
  1974年   99篇
  1973年   100篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
171.
Firms in developing countries cite credit constraints as one of their primary obstacles to investment. Direct foreign investment may ease credit constraints by bringing in scarce capital. Alternatively, if foreign firms borrow heavily from domestic banks, they may crowd local firms out of domestic capital markets. Using firm data from the Ivory Coast, we test whether: (1) domestic firms are more credit constrained than foreign firms, and (2) whether borrowing by foreign firms exacerbates domestic firm credit constraints. Results provide support for both hypotheses. We also find that state-owned enterprises (SOEs) are less financially constrained than other domestic enterprises.  相似文献   
172.
Standard models of informed speculation suggest that traders try to learn information that others do not have. This result implicitly relies on the assumption that speculators have long horizons, i.e., can hold the asset forever. By contrast, we show that if speculators have short horizons, they may herd on the same information, trying to learn what other informed traders also know. There can be multiple herding equilibria, and herding speculators may even choose to study information that is completely unrelated to fundamentals.  相似文献   
173.
Stochastic dominance and Lorenz dominance are examples of orderings which require unanimous agreement among an infinite set of indices. This paper considers various subsets of inequality measures that respect Lorenz dominance, and assesses the extent to which a small number of indices can reproduce the Lorenz ordering. Using income data for 80 countries, our results suggest that Lorenz dominance can be predicted with 99% accuracy using just 3 or 4 inequality measures, as long as two of them focus on the extreme upper and lower tails of the distribution. In contrast, confining attention to the index families and parameter ranges normally considered may fail to detect the majority of occasions when Lorenz curves intersect. These results lead us to question the faith placed in procedures based on a finite set of inequality indices, and to suggest that similar lessons will apply to other types of unanimity orderings.  相似文献   
174.
175.
176.
This paper examines Britain's long run growth and productivity performance since the late nineteenth century, taking an international comparative perspective and disaggregating by sector. Britain was richer than the United States and Germany in 1870 largely because of high levels of labour productivity in services and agriculture rather than in industry, together with a highly favourable structure, particularly a small share of the labour force in agriculture. By 1990, the productivity gap in manufacturing had not grown bigger. Rather, the deterioration in Britain's overall comparative labour productivity position has been concentrated in services and agriculture, together with the effects of structural change, particularly the later shift of labour out of agriculture in the United States and Germany.  相似文献   
177.

I had known Manohar Rao for a long time. For many years I tried to lure him to join the Indira Gandhi Institute of Development Research. He always gave me his disarming smile but his loyalty to Bombay University and to his students was unshakable. He was deeply interested in improving tools for better policy analysis. Hence in this paper I raise some related issues.

  相似文献   
178.
Annuities promise to play an increasingly important role in countries with national defined contribution retirement systems. In this article we examine life annuities in two countries, Singapore and Australia, each of which has a national mandatory pension program. Exploiting data on annuity pricing and purchase behaviour, we compare the money's worth of life annuity products across these two nations. Our results indicate that, after controlling on administrative loadings, there are important differences in measured adverse selection. Part of the explanation may be due to the different structures of the two countries’retirement systems.  相似文献   
179.
We use a vertical product differentiation model under partial market coverage to study the social welfare optimum and duopoly equilibrium when convex costs of quality provision are either fixed or variable in terms of production. We show the following new results. First, under fixed costs, the social planner charges a uniform price for the single variant that just covers costs of quality provision. Like the duopoly equilibrium, this socially optimal pricing entails a partially uncovered market, but a smaller share of the market is served compared with the duopoly equilibrium. Second, for the variable cost case, it is socially optimal to provide both high‐ and low‐quality variants, but market shares need not be equal. This differs from the result in fully covered markets. Third, in the duopoly equilibrium, the quality spread is too wide under variable costs relative to the social optimum. Under fixed costs, the duopoly produces two variants, but quality is too low relative to the social optimum, which has only one variant.  相似文献   
180.
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