first passage times;
autoregressive processes;
martingales;
exponential boundedness;
D O I:
10.1080/17442500701840885
中图分类号:
O29 [应用数学];
学科分类号:
070104 ;
摘要:
Using the martingale approach we find sufficient conditions for exponential boundedness of first passage times over a level for ergodic first order autoregressive sequences. Further, we prove a martingale identity to be used in obtaining explicit bounds for the expectation of first passage times.