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   43969篇
  免费   881篇
  国内免费   1篇
财政金融   8172篇
工业经济   3148篇
计划管理   6976篇
经济学   10052篇
综合类   548篇
运输经济   328篇
旅游经济   741篇
贸易经济   7024篇
农业经济   2192篇
经济概况   5579篇
信息产业经济   3篇
邮电经济   88篇
  2021年   266篇
  2020年   499篇
  2019年   796篇
  2018年   902篇
  2017年   953篇
  2016年   952篇
  2015年   598篇
  2014年   1028篇
  2013年   4543篇
  2012年   1402篇
  2011年   1501篇
  2010年   1293篇
  2009年   1438篇
  2008年   1370篇
  2007年   1187篇
  2006年   1111篇
  2005年   962篇
  2004年   920篇
  2003年   886篇
  2002年   871篇
  2001年   894篇
  2000年   864篇
  1999年   810篇
  1998年   831篇
  1997年   786篇
  1996年   782篇
  1995年   687篇
  1994年   691篇
  1993年   699篇
  1992年   718篇
  1991年   726篇
  1990年   620篇
  1989年   526篇
  1988年   505篇
  1987年   530篇
  1986年   521篇
  1985年   773篇
  1984年   741篇
  1983年   689篇
  1982年   633篇
  1981年   594篇
  1980年   630篇
  1979年   570篇
  1978年   470篇
  1977年   408篇
  1976年   359篇
  1975年   380篇
  1974年   320篇
  1973年   309篇
  1972年   216篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
52.
Countries on fixed exchange rates sometimes use uniform tariffcum subsidy (UTCS) schemes as a way of achieving a real depreciationwithout disturbing the nominal exchange rate. A potential drawbackof this policy in relation to an across-the-board devaluationis that a UTCS scheme provides incentives for illegal trade.Using an optimizing model with currency convertibility and illegaltrade. I find that welfare is lower under a UTCS scheme thanunder a corresponding across-the-board devaluation and thatin some cases the real exchange rate actually appreciates inresponse to an increase in the UTCS rate.  相似文献   
53.
54.
55.
This paper investigates whether governments can change market structures through interventions. We study the effects of four political events over the life cycle of the market for daily newspapers in the Netherlands. We find that policy measures meant to lower entry barriers in an expanding industry created new entry and increased survival chances for potential entrants and incumbent newspapers. Exit barrier enhancing policies to reduce concentration tendencies have not been successful.  相似文献   
56.
Recently, much of the research into the relation between market values and accounting numbers has used, or at least made reference to, the residual income model (RIM). Two basic types of empirical research have developed. The “historical” type explores the relation between market values and reported accounting numbers, often using the linear dynamics in Ohlson 1995 and Feltham and Ohlson 1995 and 1996. The “forecast” type explores the relation between market value and the present value of the book value of equity, a truncated sequence of residual income forecasts, and an estimate of the terminal value at the truncation date. The analysis in this paper integrates these two approaches. We expand the Feltham and Ohlson 1996 model by including one‐ and two‐period‐ahead residual income forecasts to infer “other” information regarding future revenues from past investments and future growth opportunities. This approach results in a model in which the difference between market value and book value of equity is a function of current residual income, one‐ and two‐period‐ahead residual income, current capital investment, and start‐of‐period operating assets. The existence of both persistence in revenues from current and prior investments and growth in future positive net present value investment opportunities leads us to hypothesize a negative coefficient on the one‐period‐ahead residual income forecast and a positive coefficient on the two‐period‐ahead residual income forecast. Our empirical results strongly support our hypotheses with respect to the forecast coefficients.  相似文献   
57.
This paper gives a tree-based method for pricing American options in models where the stock price follows a general exponential Lévy process. A multinomial model for approximating the stock price process, which can be viewed as generalizing the binomial model of Cox, Ross, and Rubinstein (1979) for geometric Brownian motion, is developed. Under mild conditions, it is proved that the stock price process and the prices of American-type options on the stock, calculated from the multinomial model, converge to the corresponding prices under the continuous time Lévy process model. Explicit illustrations are given for the variance gamma model and the normal inverse Gaussian process when the option is an American put, but the procedure is applicable to a much wider class of derivatives including some path-dependent options. Our approach overcomes some practical difficulties that have previously been encountered when the Lévy process has infinite activity.  相似文献   
58.
59.
60.
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