Assume you have the following model of the expenditure sector: AD  = C + I + G + NX         C = Co + cYD       YD = Y - TA + TR       TA  = TAo      TR  = TRo                             I = Io                                 G = Go                         NX = NXo  If a change in exports by deltaNX = - 200 is accompanied by a change in consumption by ∆C = - 800, what is the size of the expenditure multiplier?

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