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   24417篇
  免费   467篇
  国内免费   1篇
财政金融   4650篇
工业经济   1718篇
计划管理   3628篇
经济学   5391篇
综合类   380篇
运输经济   191篇
旅游经济   442篇
贸易经济   3725篇
农业经济   1262篇
经济概况   3441篇
信息产业经济   1篇
邮电经济   56篇
  2021年   134篇
  2020年   254篇
  2019年   423篇
  2018年   516篇
  2017年   539篇
  2016年   529篇
  2015年   308篇
  2014年   541篇
  2013年   2525篇
  2012年   729篇
  2011年   813篇
  2010年   679篇
  2009年   760篇
  2008年   733篇
  2007年   644篇
  2006年   579篇
  2005年   482篇
  2004年   513篇
  2003年   459篇
  2002年   511篇
  2001年   444篇
  2000年   461篇
  1999年   439篇
  1998年   406篇
  1997年   419篇
  1996年   412篇
  1995年   358篇
  1994年   368篇
  1993年   399篇
  1992年   408篇
  1991年   401篇
  1990年   329篇
  1989年   302篇
  1988年   291篇
  1987年   302篇
  1986年   310篇
  1985年   469篇
  1984年   433篇
  1983年   400篇
  1982年   376篇
  1981年   345篇
  1980年   390篇
  1979年   318篇
  1978年   270篇
  1977年   256篇
  1976年   198篇
  1975年   242篇
  1974年   193篇
  1973年   188篇
  1972年   133篇
排序方式: 共有10000条查询结果,搜索用时 2 毫秒
21.
22.
23.
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   
24.
25.
26.
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   
27.
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   
28.
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   
29.
30.
This paper develops two new methods for conducting formal statistical inference in nonlinear dynamic economic models. The two methods require very little analytical tractability, relying instead on numerical simulation of the model's dynamic behaviour. Although one of the estimators is asymptotically more efficient than the other, a Monte Carlo study shows that, for a specific application, the less efficient estimator has smaller mean squared error in samples of the size typically encountered in macroeconomics. The estimator with superior small sample performance is used to estimate the parameters of a real business cycle model using observed US time-series data.  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