STOCHASTIC UNIT ROOT MODELS
随机单位根模型AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要研究随机游走与平稳状态切换、单位根停留时间及时间序列持续性。
随机单位根模型AI 解读 ↓
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This paper develops a dynamic switching model, with a random walk and a stationary regime, where the time spent in the random walk regime is endogeneously predetermined. More precisely, we assume that the process is recursively defined by Y t = μ + Y t −1 + ε t , with stochastic probability π rw ( Y t −1 ), Y t = μ + ε t , with stochastic probability 1 − π rw ( Y t −1 ), where (ε t ) is a strong white noise and π rw is a nondecreasing function. Then, the dynamics of the process ( Y t ), its marginal distribution, and the distribution of the time spent in the unit root regime depend on the pattern of random walk intensity π rw and on the noise distribution F . Moreover, we study the links between the endogeneous switching regime and the degree of persistence of the process ( Y t ).