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排序方式: 共有135条查询结果,搜索用时 31 毫秒
81.
Bielecki and Rutkowski introduced and studied a generic nonlinear market model, which includes several risky assets, multiple funding accounts, and margin accounts. In this paper, we examine the pricing and hedging of contract from the perspective of both the hedger and the counterparty with arbitrary initial endowments. We derive inequalities for unilateral prices and we study the range of fair bilateral prices. We also examine the positive homogeneity and monotonicity of unilateral prices with respect to the initial endowments. Our study hinges on results from Nie and Rutkowski for backward stochastic differential equations (BSDEs) driven by continuous martingales, but we also derive the pricing partial differential equations (PDEs) for path‐independent contingent claims of a European style in a Markovian framework. 相似文献
82.
We introduce several new sports team rating models based on the gradient descent algorithm. More precisely, the models can be formulated by maximising the likelihood of match results observed using a single step of this optimisation heuristic. The proposed framework is inspired by the prominent Elo rating system, and yields an iterative version of ordinal logistic regression, as well as different variants of Poisson regression-based models. This construction makes the update equations easy to interpret, and adjusts ratings once new match results are observed. Thus, it naturally handles temporal changes in team strength. Moreover, a study of association football data indicates that the new models yield more accurate forecasts and are less computationally demanding than corresponding methods that jointly optimise the likelihood for the whole set of matches. 相似文献
83.
As global warming continues to attract growing levels of attention, various stakeholders (states, general public, investors, and lobbyists) have put climate change on corporate agendas and expect firms to disclose relevant greenhouse gas (GHG) information. In this paper, we investigate the consistency of the GHG information voluntarily disclosed by French listed firms through two different communication channels: corporate reports (CR) and the Carbon Disclosure Project (CDP). More precisely, we contrast the amounts of GHG emissions reported and the methodological explanations provided (named ‘traceability’) in each channel. Consistent with a stakeholder theory perspective, we find that GHG amounts are significantly lower in the CR than in the CDP. We also find that firms increase the CR figures’ traceability when there is a discrepancy between disclosures in the two channels. We suggest that the aim of this greater traceability is to enhance information credibility across the different channels used. 相似文献
84.
Marek Tomaszewski 《中国经济评论(英文版)》2014,(6):399-409
Outsourcing is a change from horizontal cooperation (coopetition) to a vertical one. That is, the company, which up to now could be considered as a competitor, changes into a supplier. It is worth remembering that the company that is to become a supplier can either create a new one or be an already existing one. This article is based on empirical data coming from the companies from the Visegrad Group that is Poland, the Czech Republic, Slovakia, and Hungary. The results presented here imply that outsourcing has a stimulating effect on innovative activity of a company both in terms of investment and implementation aspects. Also, innovative activity, in its investment and implementation aspects, positively influences the occurrence of outsourcing. This confirms the existence of feedback among these variables. It is worth noting however, that the probability of innovative activity among the companies using outsourcing is higher than the probability of outsourcing among the companies that are irmovatively active. It seems that the influence of outsourcing on innovative activity is stronger than the influence o f innovative activity on outsourcing. 相似文献
85.
An important issue arising in the context of credit default swap (CDS) rates is the construction of an appropriate model in
which a family of options written on credit default swaps, referred to hereafter as credit default swaptions, can be valued
and hedged. The goal of this work is to exemplify the usefulness of some abstract hedging results, which were obtained previously
by the authors, for the valuation and hedging of the credit default swaption in a particular hazard process setup, namely,
the CIR default intensity model. 相似文献
86.
87.
Journal of Business Ethics - Crowdfunding has created new opportunities for poor microentrepreneurs. One crucial question is the impact that the purpose of a loan—either business investment... 相似文献
88.
The Market Model of Interest Rate Dynamics 总被引:14,自引:0,他引:14
A class of term structure models with volatility of lognormal type is analyzed in the general HJM framework. The corresponding market forward rates do not explode, and are positive and mean reverting. Pricing of caps and floors is consistent with the Black formulas used in the market. Swaptions are priced with closed formulas that reduce (with an extra assumption) to exactly the Black swaption formulas when yield and volatility are flat. A two–factor version of the model is calibrated to the U.K. market price of caps and swaptions and to the historically estimated correlation between the forward rates. 相似文献
89.
Pere Riera Marek Giergiczny Josep Peñuelas Pierre-Alexandre Mahieu 《Journal of Forest Economics》2012,18(4):345-354
Choice Modelling applications can be designed to estimate main effects only or multiple-way interactions between attributes. It has been reported that higher order effects generally account for less than 10% of the choice explanation. Nevertheless, the amount of applications testing for interactions among attributes in environmental valuation is very limited. This paper reports a Choice Modelling exercise valuing climate change impacts on plant cover, land erosion and fire risk in Spanish shrublands. Two out of three two-way interactions were found significant and to account for more than 20% of the choice model explanation. Their contribution to the log-likelihood value was comparable to the one of the main effects variables. Moreover, accounting for second order interactions significantly altered the estimates of the implicit prices of attributes compared to the main effects specifications. 相似文献
90.
The Limits of Discipline: Ownership and Hard Budget Constraints in the Transition Economies 总被引:3,自引:0,他引:3
Roman Frydman Cheryl Gray Marek Hessel & Andrzej Rapaczynski 《Economics of Transition》2000,8(3):577-601
The existing literature on soft budget constraints suggests that firms may be subsidized for political reasons or because of the creditors' desire to recover a part of the sunk cost invested in an earlier period. In all these models hard budget constraints are viewed as being, in principle, capable of inducing the necessary restructuring behaviour on the level of the firm. This paper argues that the imposition of financial discipline is not sufficient to remedy ownership and governance-related deficiencies of corporate performance. Using evidence from the post-communist transition economies, the paper shows that a policy of hard budget constraints cannot induce successful revenue restructuring, which requires entrepreneurial incentives inherent in certain ownership types (most notably, outside investors). The paper also shows that the policy of hard budget constraints falters when state firms, because of inferior revenue performance and less willingness to meet payment obligations, continue to pose a higher credit risk than privatized firms. The brunt of state firms' lower creditworthiness falls on state creditors. But the 'softness' of these creditors, while harmful in many ways, is not necessarily irrational, if it prevents the demise of firms that are in principle capable of successful restructuring through ownership changes. 相似文献