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81.
In this paper we model Value‐at‐Risk (VaR) for daily asset returns using a collection of parametric univariate and multivariate models of the ARCH class based on the skewed Student distribution. We show that models that rely on a symmetric density distribution for the error term underperform with respect to skewed density models when the left and right tails of the distribution of returns must be modelled. Thus, VaR for traders having both long and short positions is not adequately modelled using usual normal or Student distributions. We suggest using an APARCH model based on the skewed Student distribution (combined with a time‐varying correlation in the multivariate case) to fully take into account the fat left and right tails of the returns distribution. This allows for an adequate modelling of large returns defined on long and short trading positions. The performances of the univariate models are assessed on daily data for three international stock indexes and three US stocks of the Dow Jones index. In a second application, we consider a portfolio of three US stocks and model its long and short VaR using a multivariate skewed Student density. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
82.
83.
Laurent Vidu 《Economic Theory》2002,20(2):373-386
Summary. We consider a set of alternatives (electoral platforms, bills, etc. ...) defined as a Cartesian product of k finite discrete sets. We assume that the preferences of the individuals (voters) are marginally single-peaked and separable.
The main result of this paper states that the pairwise majority relation satisfies these two properties but that it might
exhibit several cycles. This result is important when related to classical problems of multi-dimensional decisions such as
logrolling and vote trading. We relate our result with a continuous version of it (McKelvey, 1976).
Received: March 21, 2000; revised version: April 12, 2001 相似文献
84.
Academic literature in public finance has focused on interjurisdictional tax competition—namely among similar types of local governments—but has leaved vertical externalities arising from interactions between two overlapping governments sharing the same tax base aside. The purpose of this paper is to provide a simple model within which interjurisdictional tax competition and vertical interactions between two overlapping governments that share the same tax base can be analyzed simultaneously. We find that interjurisdictional tax competition reduces the global tax rate set by both overlapping governments (federal and local) but is unable to solve completely the distortion arising from vertical externalities. The model is also extended to allow for government subsidies to industrial capital. We give sufficient conditions for capital subsidies to be more efficient to attract capital when they are granted at a federal level rather than at a local level. 相似文献
85.
Backward Integration by a Dominant Firm 总被引:2,自引:0,他引:2
Laurent Linnemer 《Journal of Economics & Management Strategy》2003,12(2):231-259
This paper studies the welfare consequences of a vertical merger that raises rivals' costs when downstream competition is a la Cournot between firms with constant asymmetric marginal costs. The main result is that such a vertical merger can nevertheless improve welfare if it involves a downstream firm whose cost is low enough. This is because by raising the input price paid by the nonmerging firms the merger shifts production away from those relatively inefficient producers in favor of the more efficient firm. Yet, there is a trade-off between the gain in productive efficiency and the loss in consumers' surplus caused by the higher downstream price that follows a higher input price. It is also shown, through an example, that this result extends to price competition with differentiated products. 相似文献
86.
Pierre Pessarossi Christophe J. Godlewski Laurent Weill 《Journal of Asian Economics》2012,23(4):423-433
This paper considers whether information asymmetries affect the willingness of foreign banks to participate in syndicated loans to corporate borrowers in China. We analyze how ownership concentration, which influences information asymmetries in the relationship between the borrower and the lender, exerts an impact on the participation of foreign banks in syndicated loans granted to Chinese borrowers in the period 2004–2009. We observe that greater ownership concentration of the borrowing firm does not positively influence participation of foreign banks in the loan syndicate. We conclude that information asymmetries are not exacerbated for foreign banks relative to local banks in China. 相似文献
87.
Roman Horváth Jakub Seidler Laurent Weill 《Journal of Financial Services Research》2014,45(3):341-361
We examine the relation between capital and liquidity creation. This issue is interesting because of the potential impact on liquidity creation from tighter capital requirements such as those in Basel III. We perform Granger-causality tests in a dynamic GMM panel estimator framework on an exhaustive data set of Czech banks, which mainly includes small banks from 2000 to 2010. We observe a strong expansion in liquidity creation until the financial crisis that was mainly driven by large banks. We show that capital negatively Granger-causes liquidity creation in this industry, where majority of banks are small. But we also observe that liquidity creation Granger-causes a reduction in capital. These findings support the view that Basel III can reduce liquidity creation, but also that greater liquidity creation can reduce banks’ solvency. Thus, we show that this reverse causality generates a trade-off between the benefits of financial stability induced by stronger capital requirements and the benefits of increased liquidity creation. 相似文献
88.
Monetary union can benefit countries suffering from policy credibility problems if it eliminates the inflation bias and also allows for more efficient management of certain shocks. But it also carries costs as some stabilization may be feasible even in the absence of credibility, and this may be more than what an individual country can hope for in a monetary union. In this paper, we combine the stabilization and credibility branches of the currency union literature and construct a simple welfare criterion that can be used to evaluate alternative monetary arrangements. We produce examples where monetary union may be welfare improving even for low-modest levels of inflation bias (2-3%) as long as business cycles are not too a-synchronized across countries. 相似文献
89.
This article analyses the cost efficiency of French first-league rugby clubs using a stochastic frontier model. The frontier estimation confirmed that the model fits the data well with all coefficients correctly signed and in line with the theoretical requirements. The results show that one of the clubs is operating efficiently, with the majority of clubs clustered around 20% inefficiency. Policy implications are derived. 相似文献
90.
Luc Bauwens Sbastien Laurent Jeroen V. K. Rombouts 《Journal of Applied Econometrics》2006,21(1):79-109
This paper surveys the most important developments in multivariate ARCH‐type modelling. It reviews the model specifications and inference methods, and identifies likely directions of future research. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献