26. Why You CANNOT Use a VAR on Differenced Data: The VMA Implications of Cointegration (with Proof)
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YouTubeAN Economist
26. Why You CANNOT Use a VAR on Differenced Data: The VMA Implications of Cointegration (with Proof)
In this comprehensive lecture, we dive deep into the mathematical consequences of cointegration for the Vector Moving Average (VMA) representation of a time series. Building on the foundational work from J.D. Hamilton's "Time Series Analysis," we prove why a cointegrated system has a non-invertible VMA representation—and why this makes a ...
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