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Accès libre

Semiparametric segment M-estimation for locally stationary diffusions

2019, Deléamont, Pierre-Yves, La Vecchia, Davide

We develop and implement a novel M-estimation method for locally stationary diffusions observed at discrete time-points. We give sufficient conditions for the local stationarity of general time-inhomogeneous diffusions. Then we focus on locally stationary diffusions with time-varying parameters, for which we define our M-estimators and derive their limit theory.