Show that the GARCH (1,1) model in equation (23.9) is equivalent to the stochastic volatility model where

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Show that the GARCH (1,1) model = @+au + Bo n-1


in equation (23.9) is equivalent to the stochastic volatility modeldV = a(V, –V)dt +¿V dz  

where time is measured in days and  is the square of the volatility of the asset price and 


What is the stochastic volatility model when time is measure in years? 

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