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61.
In practice, the choice of using a local volatility model or a stochastic volatility model is made according to their respective
ability to fit implied volatility surfaces. In this paper, we adopt a different point of view. Indeed, using a purely statistical
methodology, we design new procedures aiming at testing the assumption of a local volatility model for the price dynamics,
against the alternative of a stochastic volatility model. These test procedures are based only on historical data and do not
require any calibration procedures via option prices. We also provide a convincing simulation study and an empirical analysis
on future contracts on interest rates. 相似文献
62.
This paper provides a coherent method for scenario aggregation addressing model uncertainty. It is based on divergence minimization from a reference probability measure subject to scenario constraints. An example from regulatory practice motivates the definition of five fundamental criteria that serve as a basis for our method. Standard risk measures, such as value‐at‐risk and expected shortfall, are shown to be robust with respect to minimum divergence scenario aggregation. Various examples illustrate the tractability of our method. 相似文献
63.
The objective of this paper is to investigate whether banks view the information on the off-balance sheet liabilities (specifically, operating leases) disclosed in the notes to the financial statements as more reliable when it is audited by brand name auditors (i.e. a Big 4 audit firm). To the extent that banks assess a higher likelihood that the financial statements could have material misstatements if it is not audited by a Big 4 audit firm, they should charge a higher interest rate on private loans. Our findings suggest that the impact of operating leases on the interest rate is higher if the firm is audited by non-Big 4 audit firms. 相似文献
64.
This article analyses teamwork in French car manufacturing plants and those of their suppliers. During the 1990s, the introduction of 'autonomous production units' was aimed at reducing costs, increasing quality and shortening delivery deadlines. Teamwork in a unit involved delegating responsibilities to workers and led to an increased workload. 相似文献
65.
An analysis of long-haul routes identifies trends and patterns underlying their development. Five distinct perspectives: geography, regulation, manufacturers, passengers and airlines are taken to investigate the drivers of long-haul route development. From the insights gained it is inferred that the demand for long-haul aircraft is a complex function thereof, whereby long-haul routes are operated between cities with strong business and social connections as influenced by the dynamics of change and underlying geography. 相似文献
66.
67.
Mathieu Tahon Bart Lannoo Jan Van Ooteghem Koen Casier Sofie Verbrugge Didier Colle Mario Pickavet Piet Demeester 《Telecommunications Policy》2011,35(9-10):883-894
Next generation access networks are expected to bring ubiquitous broadband access and have attracted interest of municipal governments. This paper investigates the support by municipal authorities for the rollout of such a city-wide wireless broadband access network. Different business cases for 3G and WiFi operators are developed and it is indicated how to model the specificities for commercial versus public players. Furthermore, a game theoretic approach is used to investigate the investment options of the municipal player. It is shown that a partnership between a commercial and public player is the most likely investment strategy. However, bringing more players into the competitive environment reduces the intention of the commercial partner to engage in the public–private partnership (PPP). 相似文献
68.
Mathieu Boudreault Hélène Cossette David Landriault Etienne Marceau 《Scandinavian actuarial journal》2013,2013(5):265-285
We consider an extension to the classical compound Poisson risk model for which the increments of the aggregate claim amount process are independent. In Albrecher and Teugels (2006), an arbitrary dependence structure among the interclaim time and the subsequent claim size expressed through a copula is considered and they derived asymptotic results for both the finite and infinite-time ruin probabilities. In this paper, we consider a particular dependence structure among the interclaim time and the subsequent claim size and we derive the defective renewal equation satisfied by the expected discounted penalty function. Based on the compound geometric tail representation of the Laplace transform of the time to ruin, we also obtain an explicit expression for this Laplace transform for a large class of claim size distributions. The ruin probability being a special case of the Laplace transform of the time to ruin, explicit expressions are therefore obtained for this particular ruin related quantity. Finally, we measure the impact of the various dependence structures in the risk model on the ruin probability via the comparison of their Lundberg coefficients. 相似文献
69.
Justin Yiqiang Jin Kiridaran Kanagaretnam Gerald J. Lobo Robert Mathieu 《Journal of Banking & Finance》2013
The Federal Deposit Insurance Corporation Improvement Act (FDICIA) of 1991 was designed, among other things, to introduce risk-based deposit insurance, increase capital requirements, and improve banks’ internal controls. Of particular interest in this study are the requirements for annual audit and reporting of management’s and auditor’s assessment of the effectiveness of internal control for banks with $500 million or more in total assets (raised to $1 billion in 2005). We study the impact of these requirements on banks’ risk-taking behavior prior to the recent financial crisis and the consequent implications for bank failure and financial trouble during the crisis period. Using a sample of 1138 banks, we provide evidence that banks required to comply with the FDICIA internal control requirements have lower risk taking in the pre-crisis period. Specifically, the volatility of net interest margin, the volatility of earnings, and Z score show less risk-taking behavior. Furthermore, these banks are less likely to experience failure and financial trouble during the crisis period. 相似文献
70.
Using North American data, we revisit the question first broached by Krueger (1993) and re-examined by DiNardo and Pischke (1997) of whether there exists a real wage differential associated with computer use. Employing a mixed effects model with matched employer–employee data to correct for the fact that workers and workplaces that use computers are self-selected, we find that computer users enjoy an almost 4% wage premium over nonusers. Failure to correct for worker and workplace selection effect leads to a more than twofold overestimate of this premium. 相似文献