Parameter Estimation for Partially Observed Affine and Polynomial Processes

This paper is devoted to parameter estimation for partially observed polynomial state space models. This class includes discretely observed affine or more generally polynomial Markov processes. The polynomial structure allows for the explicit computation of a Gaussian quasi-likelihood estimator and its asymptotic covariance matrix. We show consistency and asymptotic normality of the estimating sequence and provide explicitly computable expressions for the corresponding asymptotic covariance matrix.