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	param	t-stat
$ω$	0.1598	4.04
$α$	0.1010	14.60
$β$	0.8803	71.40
$γ$	0.2851	11.08
$δ$	1.0678	14.03

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American Railcar Industries Inc APARCH Volatility Analysis

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Parameter Estimates

News Impact Curve

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