کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5099840 | 1377041 | 2006 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Approximating volatility diffusions with CEV-ARCH models
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
کنترل و بهینه سازی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
This article develops a new model of the ARCH class which allows volatility to react nonlinearly to past shocks as a function of the past volatility level. We show that this model approximates any CEV-diffusion model for stochastic volatility, and we judge its empirical performance as a diffusion approximation to models of the short-term rate with stochastic volatility and as a filter of the unobserved volatility. We show that the estimation of the continuous time scheme to which the discrete time ARCH model converges can be safely based on simple moment conditions linking the discrete time to the continuous time parameters. A natural substitute of a global specification test for just-identified problems based on indirect inference shows in fact that this approximation to diffusions gives rise to a negligible disaggregation bias. A Monte-Carlo study reveals that the filtering performances of this model are remarkably good, even in the presence of serious misspecification.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Economic Dynamics and Control - Volume 30, Issue 6, June 2006, Pages 931-966
Journal: Journal of Economic Dynamics and Control - Volume 30, Issue 6, June 2006, Pages 931-966
نویسندگان
Fabio Fornari, Antonio Mele,