نتایج جستجو برای: autoregressive conditional heteroskedasticity arch
تعداد نتایج: 93550 فیلتر نتایج به سال:
We propose an extension of standard asymmetric volatility models in the generalized autoregressive conditional heteroskedasticity (GARCH) class that admits conditional nonGaussianities in a tractable fashion. Our “bad environment-good environment" (BEGE) model utilizes two gamma-distributed shocks and generates a conditional shock distribution with time-varying heteroskedasticity, skewness, and...
Methods: Using daily exchange rates for 7 years (January 1, 2008, to April 30, 2015), this study attempted to model dynamics following generalized autoregressive conditional heteroscedastic (GARCH), asymmetric power ARCH (APARCH), exponential generalized autoregressive conditional heteroscedstic (EGARCH), threshold generalized autoregressive conditional heteroscedstic (TGARCH), and integrated g...
This paper develops a generalized regime-switching (GRS) model of the short-term interest rate. The model allows the short rate to exhibit both mean reversion and conditional heteroskedasticity and nests the popular generalized autoregressive conditional heteroskedasticity (GARCH) and square root process specifications. The conditional variance process accommodates volatility clustering and dep...
This dissertation covers the two major parts of my PhD research: i) Modeling instantaneous correlation ii) Quantifying time-lag correlation iii) Modeling time-lag correlation iv) Modeling and application of heteroskedasticity. For modeling instantaneous correlation, we studied the limitations of random matrix theory (RMT), and proposed autoregressive random matrix theory (ARRMT) which take into...
A wide range of tests for heteroskedasticity have been proposed in the econometric and statistics literature. Although a few exact homoskedasticity tests are available, the commonly employed procedures are quite generally based on asymptotic approximations which may not provide good size control in finite samples. There has been a number of recent studies that seek to improve the reliability of...
There has been an increasing interest in hypothesis testing with inequality restrictions. An important example in time series econometrics is hypotheses on autoregressive conditional heteroskedasticity (ARCH). We propose a one-sided test for ARCH using the wavelet method, a new analytic tool developed in the last decade or so. The test is based on a wavelet spectral density estimator at frequen...
چکیده بازار قرارداد های آتی عامل مهم ومؤثری در گردش، حرکت و کارآ شدن اقتصاد است ؛ ماهیت قیمت طلا به عنوان یک کالای فیزیکی و دارایی مالی و وجود عوامل متعدد تأثیرگذار بر بازارهای آتی طلا موجب شده است که تحلیل روابط متغیرهای اصلی این بازارها پیچید ه تر شود.هدف از این مطالعه بررسی عوامل مؤثر بر تغییر پذیری قیمت های آتی سکه طلا است.داده های مورد استفاده در این تحقیق،سری زمانی روزانه قیمت های آتی و ن...
This paper gives necessary and sufficient conditions for stationarity and existence of second moments in mixtures of linear vector autoregressive models with autoregressive conditional heteroskedasticity. Sufficient conditions are also provided for a more general model in which the mixture components are permitted to exhibit limited forms of nonlinearity. When specialized to the corresponding n...
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