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	param	t-stat
$ω$	0.0247	21.50
$α$	0.1016	43.17
$β$	0.8984	353.00
$γ$	-0.0263	-1.52
$δ$	1.8784	49.50

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Delta Natural Gas Co Inc APARCH Volatility Analysis

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News Impact Curve

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