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ARIMA Using Stata
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Time Series Analysis Stochastic Data Generating Process –Stable and Stationary Process Autoregressive Process: AR(p) Moving Average Process: MA(q) ARMA(p,q) –Integrated Nonstationary Process ARIMA(p,d,q)
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AR(p)
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MA(q)
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ARMA(p,q)
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Time Series Analysis Identification –Autocorrelation Function MA(q) –Partial Autocorrelation AR(p) –Hypothesis Testing Bartlett Test Box-Pierce Q Test
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Time Series Analysis Estimation –Maximum Likelihood Estimation –Diagnostic Checking Forecasting –Dynamic Forecast
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Seasonal ARMA(p,q) Example: U. S. Whole Sale Price Index, 1960Q1-1990Q4Example: U. S. Whole Sale Price Index, 1960Q1-1990Q4
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Multiplicative ARMA(p,q) Example: Airline Passengers, January 1949- December 1960Example: Airline Passengers, January 1949- December 1960
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ARMAX(p,q) Example: U.S. Consumption-Income RelationshipExample: U.S. Consumption-Income Relationship
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Transfer Function The Model Impulse Response Function x t ~ARMA(p,q) Filterted y t
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Transfer Function The Transformed Model Cross Covariance
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Transfer Function Cross Correlation Model Identification based on uv (j) –Under null hypothesis uv (j) = 0 –Identify the finite-parameter structure of (B) Model Estimation using ARMAX(p,q):
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Transfer Function Example –U.S. Consumption-Income Relationship (dpi_pce8.do)dpi_pce8.do
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