In this problem we extend the Vasicek model to allow the mean rate to become stochastic.
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In this problem we extend the Vasicek model to allow the mean rate θ to become stochastic. Think of a situation in which the Federal Reserve makes minor adjustments to short-term market rates to manage the temperature of the economy. The model comprises the following two equations:
The Brownian motion d B is the same for both the interest rate r and its mean level θ. Answer the following questions:
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