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	param	t-stat
$ω$	1.0000	2.81
$α$	0.1325	14.70
$β$	0.8288	68.44
$γ$	0.0675	1.61
$δ$	1.5873	10.49

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Asterias Biotherapeutics Inc APARCH Volatility Analysis

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Parameter Estimates

News Impact Curve

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