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	param	t-stat
$ω$	0.9958	7.29
$α$	0.0781	5.12
$β$	0.8598	35.04
$γ_{1}$	-0.0078	-0.12
$γ_{2}$	0.0218	0.19
$γ_{3}$	-0.0236	-0.29
$γ_{4}$	-0.0134	-0.26
$γ_{5}$	0.1049	2.01
$γ_{6}$	-0.1933	-3.18
$γ_{7}$	0.1826	3.66
$γ_{8}$	-0.0583	-1.26
$γ_{9}$	-0.0512	-0.81
$γ_{10}$	0.0479	0.97

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Harley-Davidson Inc Zero Slope Spline-GARCH Volatility Analysis

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News Impact Curve

Volatility Forecast

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