A problem of hypothesis testing is considered for a model of diffusion process with diusion coecient tending to zero. A simple hypothesis and a semiparametric alternative are formulated in the terms of the values of some functional of nonperturbed trajectory of the dynamical system. The test proposed is locally asymptotically uniformly most powerful for a class of contiguous alternatives.
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Paper provided by Department of Economics University of Milan Italy in its series Departemental Working Papers with number
2000-02.
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