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61.
Uncertainty and the size distribution of rewards from innovation 总被引:3,自引:1,他引:3
Previous research has shown that the distribution of profit outcomes from technological innovations is highly skew. This
paper builds upon those detailed findings to ask: what stochastic processes can plausibly be inferred to have generated the
observed distributions? After reviewing the evidence, this paper reports on several stochastic model simulations, including
a pure Gibrat random walk with monthly changes approximating those observed for high-technology startup company stocks and
a more richly specified model blending internal and external market uncertainties. The most highly specified simulations suggest
that the set of profit potentials tapped by innovators is itself skew-distributed and that the number of entrants into innovation
races is more likely to be independent of market size than stochastically dependent upon it. 相似文献
62.
We characterize the individual's attitude towards risk, prudence and temperance in the gain and loss domains. We analyze the links between the three features of preferences for a given domain and between domains for each feature of preferences. Consequently, the reflection effect, the mixed risk aversion and the risk apportionment, are key concepts of our study. We also display some determinants for risk aversion, prudence and temperance in each domain. To do this, we conducted a lab experiment with students eliciting risk aversion, prudence and temperance in the two domains, and collected information about each subject's characteristics. 相似文献
63.
We apply portfolio theory to assess the consequences in terms of risk sharing of the evolution of the industry mix of European Union countries between 1986 and 1997, and of the changes in the membership configurations of both economic and monetary unions. We compute a measure of risk-return performance for EU countries, by considering countries as collections of industries, and observe that risk-return performance improved in most countries. We find that the EU9 is marginally more efficient than the other historical EU groupings and that the Euro Zone might slightly benefit from the inclusion of the United Kingdom. 相似文献
64.
The goal of this study is to measure market prices of risk and foreign exchange risk premia. Estimations of minimum variance
pricing kernels permit to determine market prices of risk, which, in an international no-arbitrage framework, allow to measure
foreign exchange risk premia. Market prices of risk are time-varying and surge during financial turmoils. Foreign exchange
risk premia are on average small in comparison to interest rate differentials and exhibit significant variation from the early
1970s onwards, when the Bretton Woods exchange rate system collapsed. At times, foreign exchange risk premia dominate interest
rate differentials.
We are indebted to Baldev Raj, Robert Kunst, the associate editor of Empirical Economics and two anonymous referees for their
valuable comments. We also thank seminar participants at the European Central Bank, the Bank of England and Queen Mary University
of London.
The views expressed in this paper are those of the authors and do not necessarily reflect those of the European Central Bank
or the Eurosystem. 相似文献
65.
The collapse of real estate prices has historically jeopardized banking stability and triggered systemic banking crises. This paper studies risk contagion in a banking system in real estate price shock by adopting complex network theory. Modelling the real estate-related asset as a common exposure of banks to the real estate market, we propose a model that incorporates two main risk contagion channels, i.e., the financial network and asset fire sales, and reveal how the real estate price shock is transmitted and propagated across banks. We demonstrate that banking stability is highly sensitive to the real estate price shock. Moreover, due to the particularly low liquidity of the real estate market, the asset fire-sales of real estate assets overwhelms the financial network, playing the dominant role in risk contagion. Our model can be adopted by regulators to conduct stress testing and to forge effective risk management strategies. 相似文献
66.
IT集成项目的风险评价与控制 总被引:3,自引:0,他引:3
李维宁 《中南财经政法大学学报》2003,(1):89-93
本文就 IT集成项目的风险问题进行了系统研究和探讨 ,其内容包括 IT集成项目的特点、风险的产生与特征、预测和评价、防范和控制等。 相似文献
67.
董志勇 《技术经济与管理研究》2010,(3):88-93
随着金融市场理论研究和实践检验的不断发展,资本市场的许多基础理论受到了极大的挑战,与现有理论相悖的异象不断涌现。新近兴起的实验经济学为人们研究资本市场提供了一条更为有效的途径。本文分析了实验方法在资本市场研究中的利与弊,介绍了部分资本市场实验的设计过程,并应用该方法分析了风险与收益、资本市场的效率、市场泡沫的产生和破灭、CAPM理论,以及交易制度等。文章指出,在资本市场中运用实验方法进行研究,具有可控性、可比性以及可重复性等优点,为我们对于资本市场诸多理论进行检验提供了可能。在资本市场实验的设计中,我们不但需要考虑实验的各种交易制度,还需要考虑到被试人员的选择、交易资产的确定以及市场信息的设计等很多问题,只有对这些问题进行全面地考虑,才能保证实验结果的可信度,进而为我们对于各种金融理论的检验提供可能。 相似文献
68.
通过对上市公司决策主体分企业和个人两个层次的分析发现由于企业的内部控制者在委托理财行为中可以获得较大收益却无需承担失败的损失,加上长期的执法不力,他们与企业存在利益与风险偏好上的差异,从而解释了那么多的上市公司对风险很大的委托理财趋之若鹜的原因.要重构上市公司委托理财行为中的"共有信念",需要加大执法力度,且实现一定约束下的法律成本在用于制定新的法规和执行已有法规之间的优化配置;此外,通过提高企业控制人的分成比例,设立企业控制人的个人保证账户也可以减少企业控制人在委托理财中的违法违规行为. 相似文献
69.
70.
姜海波 《吉林省经济管理干部学院学报》2012,26(3):62-65
风险是经济理性人对某一事件存在不确定性因素主观预期的概率分布。从现代财务管理理论观点看,企业目标是实现企业价值最大化。从财务管理理论角度研究企业目标实现,综合地体现在企业价值最大化,这为研究企业风险管理提供了新思路。从"企业价值链"角度对施工行业风险管理进行探究,目的是从理论上寻求风险管理对策,以实现施工企业价值最大化目标。 相似文献