Andrews, Donald W. K.; Li, Ming - In: Quantitative economics : QE ; journal of the … 16 (2025) 3, pp. 823-858
This paper considers nonparametric estimation and inference in first-order autoregressive (AR(1)) models with deterministically time-varying parameters. A key feature of the proposed approach is to allow for time-varying stationarity in some time periods, time-varying nonstationarity (i.e., unit...