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A Range-Based Test for the Parametric Form of the Volatility in Diffusion Models

Publikation: Working paperForskning

  • Institut for Økonomi
We propose a new test for the parametric form of the volatility function in continuous
time diffusion models of the type dXt = a(t,Xt)dt + s(t,Xt)dWt. Our approach involves
a range-based estimation of the integrated volatility and the integrated quarticity, which
are used to construct the test statistic. Under rather weak assumptions on the drift and
volatility we prove weak convergence of the test statistic to a centered mixed Gaussian
distribution. As a consequence we obtain a test, which is consistent for any fixed alternative.
Moreover, we present a parametric bootstrap procedure which provides a better
approximation of the distribution of the test statistic. Finally, it is demonstrated by means
of Monte Carlo study that the range-based test is more powerful than the return-based test
when comparing at the same sampling frequency.
UdgiverInstitut for Økonomi, Aarhus Universitet
Antal sider23
StatusUdgivet - 2007

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