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Optional decompositions under constraints
Föllmer, Hans; Kramkov, D. O. - 1997
Motivated by a hedging problem in mathematical finance, El Karoui and Quenez [7] and Kramkov [14] have developed optional versions of the Doob-Meyer decomposition which hold simultaneously for all equivalent martingale measures. We investigate the general structure of such optional...
Persistent link: https://www.econbiz.de/10009657127
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Estimation and testing for varying coefficients in additive models with marginal integration
Yang, Lijian; Härdle, Wolfgang; Park, Byeong U. - 2002
We propose marginal integration estimation and testing methods for the coefficients of varying coefficient multivariate … regression model. Asymptotic distribution theory is developed for the estimation method which enjoys the same rate of convergence … as univariate function estimation. For the test statistic, asymptotic normal theory is established. These theoretical …
Persistent link: https://www.econbiz.de/10009627286
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Finance, investment, and firm value in Germany and the US : a comparative analysis
Nowak, Eric - 1998
Germany and the United States are generally seen as the two competing systems of corporate governance. In search for a comparative welfare analysis of the financial systems, we are interested in (i) the aggregate value-added of corporate investments in the two countries and in (ii) the...
Persistent link: https://www.econbiz.de/10009578016
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The response of long-term interest rates to news about monetary policy actions : empirical evidence for the US and Germany
Nautz, Dieter; Wolters, Jürgen - 1998
We reexamine the expectations theory of the term structure focusing on the question how monetary policy actions indicated by changes in the very short rate affect long-term interest rates. Our main point is that the expectations hypothesis implies that very long rates should only react to...
Persistent link: https://www.econbiz.de/10009578577
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Lag selection in subset VAR models with an application to a US monetary system
Brüggemann, Ralf; Lütkepohl, Helmut - 2000
Alternative modeling strategies for specifying subset VAR models are considered. It is shown that under certain conditions a testing procedure based on t-ratios is equivalent to sequentially eliminating lags that lead to the largest improvement in a prespecified model selection criterion. A...
Persistent link: https://www.econbiz.de/10009583885
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A fractionally integrated model with a mean shift for the US and the UK real oil prices
Gil-Alaña, Luis A. - 2000
In this article we model the log of the U.S. and the U.K. real oil prices in terms of fractionally integrated processes with a mean shift. We use different versions of the tests of Robinson (1994), which have standard null and local limit distributions. The results indicate that if we model the...
Persistent link: https://www.econbiz.de/10009611543
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Modeling the US short-term interest rate by mixture autoregressive processes
Lanne, Markku; Saikkonen, Pentti - 2000
A new kind of mixture autoregressive model with GARCH errors is introduced and applied to the U.S. short-term interest rate. According to the diagnostic tests developed in the paper and further informal checks the model is capable of capturing both of the typical characteristics of the...
Persistent link: https://www.econbiz.de/10009612047
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On the (nonlinear) relationship between exchange rate uncertainty and trade : an investigation of US trade figures in the Group of Seven
Herwartz, Helmut (contributor) - 2003 - [Elektronische Ressource]
Persistent link: https://www.econbiz.de/10001918978
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A class of Health-Jarrow-Morton models in which the unbiased expectations hypothesis holds
Riedel, Frank - 1997
The unbiased expectations hypothesis states that forward rates are unbiased estimates for future short rates. Cox, Ingersoll and Ross [1] conjectured that this hypothesis should be inconsistent with the absence of arbitrage possibilities. Using the framework of Heath, Jarrow and Morton [4] we...
Persistent link: https://www.econbiz.de/10009632605
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Canonical decomposition of linear transformations of two independent Brownian motions
Föllmer, Hans; Wu, Ching-Tang; Yor, Marc - 1998
Motivated by the Kyle-Back model of “insider trading”, we consider certain classes of linear transformations of two independent Brownian motions and study their canonical decomposition as semimartingales in their own filtration. In particular we characterize those transformations which...
Persistent link: https://www.econbiz.de/10009578007