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	param	t-stat
$ω$	1.0000	3.96
$α$	0.0890	16.28
$β$	0.8816	94.63
$γ$	0.3379	11.86
$δ$	2.1953	23.38

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Yingli Green Energy Holding Co Ltd APARCH Volatility Analysis

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Parameter Estimates

News Impact Curve

Volatility Forecasts

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