全文获取类型
收费全文 | 4485篇 |
免费 | 46篇 |
国内免费 | 13篇 |
专业分类
财政金融 | 589篇 |
工业经济 | 209篇 |
计划管理 | 894篇 |
经济学 | 1059篇 |
综合类 | 213篇 |
运输经济 | 32篇 |
旅游经济 | 16篇 |
贸易经济 | 1001篇 |
农业经济 | 85篇 |
经济概况 | 394篇 |
信息产业经济 | 4篇 |
邮电经济 | 48篇 |
出版年
2024年 | 3篇 |
2023年 | 5篇 |
2022年 | 30篇 |
2021年 | 171篇 |
2020年 | 46篇 |
2019年 | 21篇 |
2018年 | 206篇 |
2017年 | 222篇 |
2016年 | 191篇 |
2015年 | 68篇 |
2014年 | 98篇 |
2013年 | 131篇 |
2012年 | 403篇 |
2011年 | 351篇 |
2010年 | 186篇 |
2009年 | 137篇 |
2008年 | 161篇 |
2007年 | 126篇 |
2006年 | 176篇 |
2005年 | 1008篇 |
2004年 | 491篇 |
2003年 | 184篇 |
2002年 | 37篇 |
2001年 | 24篇 |
2000年 | 22篇 |
1999年 | 4篇 |
1998年 | 4篇 |
1997年 | 3篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1977年 | 1篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1965年 | 2篇 |
1963年 | 3篇 |
1962年 | 2篇 |
1961年 | 2篇 |
排序方式: 共有4544条查询结果,搜索用时 15 毫秒
131.
We study the formation of derivative prices in an equilibrium between risk-neutral agents with heterogeneous beliefs about the dynamics of the underlying. Under the condition that short-selling is limited, we prove the existence of a unique equilibrium price and show that it incorporates the speculative value of possibly reselling the derivative. This value typically leads to a bubble; that is, the price exceeds the autonomous valuation of any given agent. Mathematically, the equilibrium price operator is of the same nonlinear form that is obtained in single-agent settings with worst-case aversion against model uncertainty. Thus, our equilibrium leads to a novel interpretation of this price. 相似文献
132.
Maximilian?Ga? Kathrin?GlauEmail author Mirco?Mahlstedt Maximilian?Mair 《Finance and Stochastics》2018,22(3):701-731
Recurrent tasks such as pricing, calibration and risk assessment need to be executed accurately and in real time. We concentrate on parametric option pricing (POP) as a generic instance of parametric conditional expectations and show that polynomial interpolation in the parameter space promises to considerably reduce run-times while maintaining accuracy. The attractive properties of Chebyshev interpolation and its tensorized extension enable us to identify broadly applicable criteria for (sub)exponential convergence and explicit error bounds. The method is most promising when the computation of the prices is most challenging. We therefore investigate its combination with Monte Carlo simulation and analyze the effect of (stochastic) approximations of the interpolation. For a wide and important range of problems, the Chebyshev method turns out to be more efficient than parametric multilevel Monte Carlo. We conclude with a numerical efficiency study. 相似文献
133.
Nilakshi Borah Liu Pan Jung Chul Park Nan Shao 《Review of Quantitative Finance and Accounting》2018,51(3):683-718
We find that firm value is reduced via industrial diversification and this reduction in value depends upon a firm’s technology intensity. We consider that asymmetric information problems are more severe in technology intensive industries and find that high tech industry firms present distinctly larger value reduction when compared to low tech industry firms. The negative valuation effect is greater for firms that have a relatively larger amount of intangible assets and greater R&D capital. We determine that our findings are robust to different estimation methods and alternative excess value measures. 相似文献
134.
We study the explosion of the solutions of the SDE in the quasi-Gaussian HJM model with a CEV-type volatility. The quasi-Gaussian HJM models are a popular approach for modeling the dynamics of the yield curve. This is due to their low-dimensional Markovian representation which simplifies their numerical implementation and simulation. We show rigorously that the short rate in these models explodes in finite time with positive probability, under certain assumptions for the model parameters, and that the explosion occurs in finite time with probability one under some stronger assumptions. We discuss the implications of these results for the pricing of the zero coupon bonds and Eurodollar futures under this model. 相似文献
135.
The aim of this paper is threefold. Firstly, we study stochastic evolution equations (with the linear part of the drift being a generator of a \(C_{0}\)-semigroup) driven by an infinite-dimensional cylindrical Wiener process. In particular, we prove, under some sufficient conditions on the coefficients, the existence and uniqueness of solutions for these stochastic evolution equations in a class of Banach spaces satisfying the so-called \(H\)-condition. Moreover, we analyse the Markov property of the solutions.Secondly, we apply the abstract results obtained in the first part to prove the existence and uniqueness of solutions to the Heath–Jarrow–Morton–Musiela (HJMM) equations in weighted Lebesgue and Sobolev spaces.Finally, we study the ergodic properties of the solutions to the HJMM equations. In particular, we find a sufficient condition for the existence and uniqueness of invariant measures for the Markov semigroup associated to the HJMM equations (when the coefficients are time-independent) in the weighted Lebesgue spaces.Our paper is a modest contribution to the theory of financial models in which the short rate can be undefined. 相似文献
136.
This study empirically examines whether environmental information disclosure (EID) is influenced by the characteristics of a firm's ultimate owners. Based on the EID of publicly listed firms in China, we qualitatively measure the quality of EID of each firm and link those quality scores to firm characteristics to understand the determinants of EID. We further link the EID scores to market valuation of the firm through the Ohlson valuation model to understand whether the market appreciates EID. Our results show that EID is more likely for government‐controlled firms, firms with less hierarchy in their ultimate ownership and firms with more discrepancy between voting rights and cash flow rights. Our results also indicate that the stock market appreciates environmental issues and that EID itself, as well as disclosure quality, is associated with a higher market valuation. Our results still hold with the endogeneity issue controlled. 相似文献
137.
张楠 《内蒙古财经学院学报(综合版)》2015,(2):92-94
公立医院改革是新医改的重点和难点内容。本研究总结了内蒙古自治区公立医院改革试点工作的主要经验,在系统评价的基础上,基于内蒙古自治区经济社会发展以及医药卫生体制改革的现状,分析目前内蒙古公立医院改革存在的主要问题,有针对性地提出解决对策,为更好地推进公立医院改革提供借鉴。 相似文献
138.
139.
随着科技的发展,食品工业也得到快速发展,食品保鲜是食品界十分关注的问题。在食品保鲜中常用的微生物防腐剂是一类由微生物产生的食品防腐剂,它能抑制微生物的生长或直接杀死微生物,是一种天然、安全、高效的防腐剂,在食品保鲜界的应用越来越广泛。本文首先分析微生物防腐剂的种类,然后具体介绍了在食品保鲜中使用最广泛的乳酸链球菌素和纳他霉素的具体应用,对于微生物防腐剂在食品保鲜上的应用有很强的现实意义。 相似文献
140.