Marginal revenue is the change in total revenue when one more unit of a commodity is sold.
MR= change in TR/change in quantity sold
Average revenue refers to revenue per unit of output.
Relationship between AR and MR:
a) When AR is decreasing, MR should be decreasing faster than AR. Thus, downward sloping MR curve is below the downward sloping AR curve(a situation of monopoly and monopolistic competition)
b) If AR is constant, MR is equal to AR. Both are indicated by the same horizontal straight line(a situation of perfect competition)
c) MR can be negative, but not AR.
October 24, 2014, 16:20