Bootstrap method for misspecified ergodic Levy driven stochastic differential equation models
Bootstrap method for misspecified ergodic Levy driven stochastic differential equation models
复制标题
用于错误指定遍历 Levy 驱动的随机微分方程模型的 Bootstrap 方法
DOI:
10.1007/s10463-022-00854-2
复制
发表时间:
2022
影响因子:
1
通讯作者:
Yuma Uehara
中科院分区:
文献类型:
--
作者:
北村 健浩;イスラム マーフズル;久門尚史;和田修己;Yuma Uehara
In this paper, we consider possibly misspecified stochastic differential equation models driven by Lévy processes. Regardless of whether the driving noise is Gaussian or not, Gaussian quasi-likelihood estimator can estimate unknown parameters in the drift and scale coefficients. However, in the misspecified case, the asymptotic distribution of the estimator varies by the correction of the misspecification bias, and consistent estimators for the asymptotic variance proposed in the correctly specified case may lose theoretical validity. As one of its solutions, we propose a bootstrap method for approximating the asymptotic distribution. We show that our bootstrap method theoretically works in both correctly specified case and misspecified case without assuming the precise distribution of the driving noise.