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101.
我国基金经理投资行为实证研究 总被引:7,自引:0,他引:7
我国证券市场快速发展,推动了基金业的迅猛增长,随着基金数量的增多,作为管理基金的基金经理的作用和地位正在迅速上升。基金经理的投资决策行为势必会影响到基金的业绩,如何综合评价基金经理的投资行为,是摆在我们面前的一大课题。本文在对国内外学者有关基金经理投资行为文献评析的基础上,提出了投资行为度的概念,并运用多元回归计量方法和突变评价法对我国基金经理的投资风格、投资策略、投资绩效、择股时机选择能力、风险管理能力以及个人行为模式和基金业绩之间的关系等进行了实证检验,得出了一些有意义的结论。最后从行为金融理论角度分析了中国证券投资基金经理行为偏离的根本原因,并提出相应的政策建议。 相似文献
102.
Luca Capriotti 《Quantitative Finance》2013,13(5):485-497
We describe a simple Importance Sampling strategy for Monte Carlo simulations based on a least-squares optimization procedure. With several numerical examples, we show that such Least-squares Importance Sampling (LSIS) provides efficiency gains comparable to the state-of-the-art techniques, for problems that can be formulated in terms of the determination of the optimal mean of a multivariate Gaussian distribution. In addition, LSIS can be naturally applied to more general Importance Sampling densities and is particularly effective when the ability to adjust higher moments of the sampling distribution, or to deal with non-Gaussian or multi-modal densities, is critical to achieve variance reductions. 相似文献
103.
In Foreign Exchange Markets vanilla and barrier options are traded frequently. The market standard is a cutoff time of 10:00 a.m.
in New York for the strike of vanillas and a knock-out event based on a continuously observed barrier in the inter bank market.
However, many clients, particularly from Italy, prefer the cutoff and knock-out event to be based on the fixing published
by the European Central Bank on the Reuters Page ECB37. These barrier options are called discretely monitored barrier options.
While these options can be priced in several models by various techniques, the ECB source of the fixing causes two problems.
First of all, it is not tradable, and secondly it is published with a delay of about 10–20 min. We examine here the effect
of these problems on the hedge of those options and consequently suggest a cost based on the additional uncertainty encountered.
相似文献
104.
郝海燕 《内蒙古财经学院学报(综合版)》2014,(4):85-87
证据收集程序作为证据制度的核心,其重要地位不言而喻。但证据收集程序发挥作用,需以完善而充分的制度规定为前提。我国法律虽对证据收集程序作了一些规定,但其在内容上还存在很大缺陷。我国立法者应当从运作机制、收集方法和制裁措施等方面对证据收集程序的规定予以完善。 相似文献
105.
106.
GAME THEORETIC MODELS OF MIXED OLIGOPOLY 总被引:9,自引:0,他引:9
Abstract. In this paper we review various models that have been proposed for the study of mixed oligopoly, that is markets in which private and public firm compete on equal basis using only market instruments. 相似文献
107.
108.
于玉林 《上海立信会计学院学报》2008,22(5)
通过对计量经济学及其他计量学科发展的分析,探讨了建立计量会计学的相应条件及相关概念。明确了计量会计学的客观基础、方法、内容,并对计量会计学体系的构建进行初探。 相似文献
109.
《Journal of Purchasing & Supply Management》2022,28(2):100744
For supplier selection in the public sector, the Weighted Sum Model is often used in combination with relative scoring methods that allow rank reversal. With rank reversal we refer to a changed order in the ranking of bids leading to a new winner, after removing or adding a non-optimal bid that does not win the original tender. In practice, an important reason indicated by practitioners for using methods that allow rank reversal is that it would rarely occur in practice. Based on an analysis of 303 Dutch public tenders, this research shows this is not true. In about 1 out of 5 the tenders, rank reversal occurs after adding non-optimal fictional bids to tenders that do not have quality thresholds. After removing bids, the rate is about 1 out of 40 if a curved relative scoring method is used. In addition, the research shows that rank reversal rates increase when (i) there is no quality threshold, (ii) the number of bids increases, (iii) bid price variance increases, and (iv) price weights are not very low or high. We argue that relative scoring methods that allow rank reversal should not be used in public procurement, or otherwise only in exceptional cases, as it conflicts with public procurement principles and leads to reduced overall bid value. 相似文献
110.
Suzuka Okuyama 《The Manchester School》2023,91(5):482-505
This study investigates mixed markets in which a social welfare-maximizing public firm and a private firm engage in behavior-based price discrimination (BBPD). A total of two cases are considered: one where domestic shareholders completely own the private firm and one where foreign shareholders completely own it. In the domestic mixed duopoly, BBPD is irrelevant from the viewpoint of domestic social welfare. This is because poaching does not occur. In the international mixed duopoly, BBPD improves domestic social welfare, as BBPD reduces the outflow of the private firm's profit to foreign shareholders. In both cases, privatization is more undesirable under BBPD than uniform pricing. 相似文献