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111.
In this paper consistent and, in a well–defined sense, optimal moment–estimators of the regression coefficient in a simple regression model with errors in variables are derived. The asymptotic variance and other asymptotic properties of these estimators are given. As is known for a long time, serious estimation problems exist in this model. There are two ways out of this problem: using either additional assumptions or additional information in the data. A lot of attention has been paid to the use of additional assumptions. However, quite often this leads to rather unrealistic models. In this paper we use additional information in the data. That means here that, besides first and second order moments, third order moments are formulated as functions of the model parameters. Besides theoretical derivations a small study with generated data is discussed. This study shows that for samples larger than 50 the estimates we consider behave nicely. 相似文献
112.
An equity market is called diverse if no single stock is ever allowed to dominate the entire market in terms of relative capitalization. In the context of the standard Itô-process model initiated by Samuelson (1965) we formulate this property (and the allied, successively weaker notions of weak diversity and asymptotic weak diversity) in precise terms. We show that diversity is possible to achieve, but delicate. Several examples are provided which illustrate these notions and show that weakly-diverse markets contain relative arbitrage opportunities: it is possible to outperform or underperform such markets over any given time-horizon. The existence of this type of relative arbitrage does not interfere with the development of contingent claim valuation, and has consequences for the pricing of long-term warrants and for put-call parity. Several open questions are suggested for further study.Received: January 2004, Mathematics Subject Classification (2000):
60H10, 91B28; 60J55JEL Classification:
G10We are grateful for the helpful remarks offered by seminar audiences at Columbia, Yale, Princeton, the Sloan School of MIT, Boston University, the Mathematical Institute in Oberwolfach, and the Universities of Athens, Connecticut/Storrs and Texas/Austin. Special thanks go to Professors Jérôme Detemple, Julien Hugonnier, Ralf Korn, Andrew Lo, Mark Lowenstein and Steven Shreve. We are also indebted to Dr. Adrian Banner for a number of discussions that helped sharpen our thinking about these problems, and to the referees and editors for suggestions that improved the exposition. A significant part of this work was completed in the spring semester of 2002, while the second author was on sabbatical leave at the Cowles Foundation for Research in Economics, Yale University. He is grateful to the Foundation for its hospitality. 相似文献
113.
Frank Marohn 《Metrika》2005,61(3):251-260
We establish exponential bounds for the probability that a generalized order statistic exceeds a given threshold or falls below a given threshold. As a main tool we apply the Bernstein inequality for sums of independent random variables.Received May 2003 相似文献
114.
依据《破产法》(2007)对清偿顺序的规定,将担保分为拥有优先清偿权的债务担保和普通债务担保,并推导出展期下的两类担保定价公式;采用数值积分求得近似解,并运用二叉树及蒙特卡洛模拟等方法对解的准确性进行检验;对资产负债比、波动率等重要因子相继进行静态、比较静态以及动态分析,并结合实际数据给出了相应的结论。 相似文献
115.
116.
民法保护是商业秘密法律保护的重要组成部分,对于保护商业秘密权利人的合法权益,维护正常的市场竞争环境,建立和谐的市场竞争秩序,具有十分重要的作用。在民法保护中,应当准确界定商业秘密的权利归属,合理划分侵权诉讼的举证责任,明确商业秘密被侵权时可采取的法律保护形式,依法判定侵权人应当承担的民事法律责任。 相似文献
117.
本文从现有多元化争论现象出发,分析了公司多元化诱因,阐述了多元化影响因素,在此基础上构建公司多元化产生的“IO-TL”模型,随后从动态视角深入分析了多元化“IO-TL”模型,并推理出公司多元化逻辑:公司多元化行为由公司所面临的行业秩序和自身的技术水平状况共同决定,短期内,公司最优多元化程度是存在的、稳定的;从长期来看,公司最优多元化程度随公司所面临的行业秩序和自身的技术水平发展而不断变化 相似文献
118.
119.
Order aggressiveness and order book dynamics 总被引:2,自引:0,他引:2
In this paper, we study the determinants of order aggressiveness and traders’ order submission strategy in an open limit order book market. Applying an order classification scheme, we model the most aggressive market orders, limit orders as well as cancellations on both sides of the market employing a six-dimensional autoregressive conditional intensity model. Using order book data from the Australian Stock Exchange, we find that market depth, the queued volume, the bid-ask spread, recent volatility, as well as recent changes in both the order flow and the price play an important role in explaining the determinants of order aggressiveness. Overall, our empirical results broadly confirm theoretical predictions on limit order book trading. However, we also find evidence for behavior that can be attributed to particular liquidity and volatility effects.
相似文献
order="0"> | Nikolaus HautschEmail: |
120.
本文探讨了政府干预在新兴工业化国家实现经济飞速增长中的作用.按照杨小凯的增长模型,经济增长的本质在于市场分工的扩展与深化.欧美发达国家主要依赖市场本身的力量来实现分工的扩展与深化,政府只是对市场失灵进行干预.而新兴工业化国家由于历史和文化的原因,以及对"赶超"发达国家的渴望,政府部分地替代了市场的作用,这种干预对分工和交易的扩展产生了积极的作用,但同时对经济在规则与组织层面上也产生了极大的消极影响. 相似文献