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801.
802.
Wolfgang Aussenegg 《Journal of Banking & Finance》2011,35(3):698-708
Testing calibration quality by means of backtesting is an integral part in the validation of credit rating systems. Against this background this paper provides a comprehensive overview of existing testing procedures. We study the procedures’ deficiencies theoretically and illustrate their impact empirically. Based on the insights gained therefrom, we develop enhanced hybrid testing procedures which turn out to be superior to the commonly applied methods. We also propose computationally efficient algorithms for our calibration tests. Finally, we are able to demonstrate empirically that our method outperforms existing tests in a scenario analysis using rating data of Moody’s. 相似文献
803.
We examine time-varying behaviour and determinants of asset swap (ASW) spreads for 23 iBoxx European corporate bond indexes from January 2006 to January 2009. The results of a Markov switching model suggest that ASW spreads exhibit regime-dependent behaviour. The evidence is particularly strong for Financial and Corporates Subordinated indexes. Stock market volatility determines ASW spread changes in turbulent periods, whereas stock returns tend to affect spread changes in calm periods. While market liquidity affects spreads only in turbulent regimes the level of interest rates is an important determinant of spread changes in both regimes. Finally, we identify stock returns, lagged ASW spread levels, and lagged volatility of ASW spreads as major drivers of the regime shifts. The results are robust in the extended sample (January 2006 to October 2013) that includes a post-crisis period. 相似文献
804.
Wolfgang Kluge 《Quantitative Finance》2013,13(8):951-959
We derive explicit valuation formulae for an exotic path-dependent interest rate derivative, namely an option on the composition of LIBOR rates. The formulae are based on Fourier transform methods for option pricing. We consider two models for the evolution of interest rates: an HJM-type forward rate model and a LIBOR-type forward price model. Both models are driven by a time-inhomogeneous Lévy process. 相似文献
805.
Wolfgang Drechsler 《公共资金与管理》2013,33(5):353-360
Wang Anshi (1021–1086) is well known as one of the greatest statesmen of classical China, but it is rarely recognized that his 1058 ‘Wan Yan Shu’ is one of the first texts of public management in the modern sense. This is because Wang addressed still current concerns of a civil service—selection, training, motivation, remuneration—often presenting solutions that are completely in line with today's perspectives. Wang's work is particularly relevant now given the current global state of public management—post-NPM but with no clear new paradigm having emerged. 相似文献
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807.
Despite a considerable premium on equity with respect to risk-free assets, many households do not own stocks. We ask why the prevalence of stockholding is so limited. We focus on individuals’ attitudes toward risk and identify relevant factors that affect the willingness to take financial risks. Our empirical evidence contradicts standard portfolio theory, as it does not indicate a significant relationship between risk aversion and financial risk taking. However, our analysis supports the behavioral view that psychological factors rooted in national culture affect portfolio choice. Individualism, which is linked to overconfidence and overoptimism, has a significantly positive effect on financial risk taking. In microdata from Germany and Singapore, as well as in cross-country data, we find evidence consistent with low levels of individualism being an important factor in explaining the limited participation puzzle. 相似文献
808.
809.
810.
Leakage from large diameter flanges had occurred several times in a new 1360 t/d ammonia plant. One such incident resulted in a large fire. The causes of this incident are examined. 相似文献