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Efficient Jacobian Evaluations for Estimating Zero Lower Bound Term Structure Models

Faster extended Kalman filter estimations of zero lower bound models of the term structure are possible if the analytic properties of the Jacobian matrix for the measurement equation are exploited. I show that such results are straighforward to incorporate, at least in Monte-Carlo-based implementations, and that will facilitate fast and robust estimations of zero lower bound term structure models with the iterated extended Kalman filter.