Estimating stochastic differential equations efficiently by minimum chi-squared
用最小卡方方法高效估计随机微分方程
We propose a minimum chi-squared estimator for the parameters of an ergodic system of stochastic differential equations with partially observed state. We prove that the efficiency of the estimator approaches that of maximum likelihood as the number of moment functions entering the chi-squared criterion increases and as the number of past observations entering each moment function increases. The rninimised criterion is asymp totically chi-squared and can be used to test…