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The Cornish-Fisher-Expansion in the context of Delta - Gamma - Normal approximations

Jaschke, Stefan R. - 2001

Qualitative and quantitative properties of the Cornish-Fisher-Expansion in the context of Delta-Gamma-Normal approaches to the computation of Value at Risk are presented. Some qualitative deficiencies of the Cornish-Fisher-Expansion - the monotonicity of the distribution function as well as...

Persistent link: https://www.econbiz.de/10009614287

Did the Fed surprise the markets in 2001? : a case study for VARs with sign restrictions

Uhlig, Harald - 2001

-interest-rate projections like those popular at many central banks are of limited informational value, can be highly misleading, and should … instead be replaced by on-theequilibrium- path projections. -- identification ; monetary policy ; vector autoregression ; sign …

Persistent link: https://www.econbiz.de/10009618362

Estimation and arbitrage opportunities for exchange rate baskets

Mercurio, Danilo; Torricelli, Costanza - 2001

This paper analyzes short term portfolio investment opportunities in a capital market where a currency is defined as a currency basket, i.e. a linear combination of foreign currencies. In line with the mean-variance hedging approach, we determine a self-financed optimal investment strategy which...

Persistent link: https://www.econbiz.de/10009613598

Nonparametric estimation and testing of interaction in additive models

Sperlich, Stefan; Tjostheim, Dag; Yang, Lijian - 1998

We consider an additive model with second order interaction terms. It is shown how the components of this model can be estimated using marginal integration, and the asymptotic distribution of the estimators is derived. Moreover, two test statistics for testing the presence of interactions are...

Persistent link: https://www.econbiz.de/10009574875

On estimation of monotone and concave frontier functions

Gijbels, Irène; Mammen, Enno; Park, Byeong U.; Simar, … - 1998

When analyzing the productivity of firms, one may want to compare how the firms transform a set of inputs x (typically labor, energy or capital) into an output y (typically a quantity of goods produced). The economic efficiency of a firm is then defined in terms of its ability of operating close...

Persistent link: https://www.econbiz.de/10009574880

Rank tests for nonlinear cointegration

Breitung, Jörg - 1998

A test procedure based on ranks is suggested to test for nonlinear cointegration. For two (or more) time series it is … is no cointegration between the time series, the sequences of ranks tend to diverge, whereas under cointegration the … perform better than their parametric competitors. To test for nonlinear cointegration a variable addition test based on ranks …

Persistent link: https://www.econbiz.de/10009578004

Testing for the cointegrating rank of a VAR process with an intercept

Saikkonen, Pentti; Lütkepohl, Helmut - 1998

Testing the cointegrating rank of a vector autoregressive process with an intercept is considered. In addition to the likelihood ratio (LR) tests developed by Johansen and Juselius and others we also consider an alternative class of tests which is based on estimating the trend parameters of the...

Persistent link: https://www.econbiz.de/10009578014

Testing for the cointegrating rank of a VAR process with structural shifts

Saikkonen, Pentti; Lütkepohl, Helmut - 2001

cointegration tests are applied to the adjusted series. The resulting tests are shown to have known limiting null distributions …

Persistent link: https://www.econbiz.de/10009578552

Canonical correlation statistics for testing the cointegration rank in a reversed order

Breitung, Jörg - 1998

to construct a confidence set for the cointegration rank. As the latter test, our tests are based on the eigenvalues of a … to Johansen's LR tests for determining the cointegration rank. …

Persistent link: https://www.econbiz.de/10009578561

Local power of likelihood ratio tests for the cointegrating rank of a VAR process

Saikkonen, Pentti; Lütkepohl, Helmut - 1997

Likelihood ratio (LR) tests for the cointegrating rank of a vector autoregressive (VAR) process have been developed under different assumptions regarding deterministic terms. For instance, nonzero mean terms and linear trends have been accounted for in some of the tests. In this paper we provide...

Persistent link: https://www.econbiz.de/10009659070