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معادلات محددة لدالة الارتباط الذاتي في حالة عدم تجانس تباينات الأخطاء العشوائية لنماذج الارتباط الذاتي من الرتبة الأولى
(الجامعة الإسلامية - غزة, 2009)
The autocorrelation function, ACF, is an important guide to the properties of a time series. We derive explicit equations for ACF in the presence of heteroscedasticity disturbances in first-order autoregressive, AR(1), ...
Explicit equations for ACF in the presence of heteroscedasticity disturbances in first-order autoregressive models, AR (1)
(2009)
The autocorrelation function, ACF, is an important guide to the properties of a time series. We derive explicit equations for ACF in the presence of heteroscedasticity disturbances in first-order autoregressive, AR (1), ...
Explicit Formulas to Determine the E¢ ciency of OLS in the Presence of First Order Autoregressive Disturbances
(الجامعة الإسلامية - غزة, 2006)
In problems concerning time series, it is often the case that the distur- bances are, in fact, correlated. It is known that the ordinary least squares (OLS) may not be optimal in this context. We have proved that the rela- ...
The efficiency of OLS in the presence of auto-correlated disturbances in regression models
(2006)
The ordinary least squares (OLS) estimates in the regression model are efficient when the disturbances have mean zero, constant variance, and are uncorrelated. In problems concerning time series, it is often the case that ...