Derive and illustrate the monetary approach to exchange rate determination.

Answer: The monetary approach is related with the Chicago School of Economics.  It is relies on two tenets: quantity theory of money and purchasing power parity.  Combing these types of two theories permits for stating, say, the $/£ spot exchange rate is as follow:

S($/£) = (M_$/M_£)(V_$/V_£)(y_£/y_$),

In which M stands for the money supply, V denotes velocity of money, and y stands for national aggregate output.  The theory carries out that what matters in exchange rate determination are:

a. The relative money supply,

b. The relative velocities of monies, and

c. The relative national outputs.