SELECT * FROM question_mgmt as q WHERE id=10309 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=60 AND chapterId=612 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th micro-economics Market Equilibrium a shift in demand curve has a larger effect on pri

Question:

A shift in demand curve has a larger effect on price and smaller effect on quantity when the number of firms is fixed compared to the situation when free entry and exits is permitted. Explain.

Answer:

The above figure depicts both the cases when the number of firms is fixed (in short run) and when the number of firms is not fixed (in long run). P = min AC represents the long run price line; D1D1 and D2D2 represents the demand in the short run and the long run respectively. The point E1 represents the initial equilibrium, where the demand and the supply intersect each other. Let us suppose that the demand curve shifts, assuming that the number of firms is fixed. Now, the new equilibrium will be at Es (as it is short run equilibrium), where the supply curve and the demand curve D2D2 intersect each other. The equilibrium price is Ps and equilibrium quantity is On the other hand,
under the assumption of free entry and exit, an increase in demand will shift the demand curve rightwards to D2D2 . The new equilibrium will be at E2 (as it is a long run equilibrium) with the equilibrium price P = min AC and equilibrium quantity qL Therefore, on comparing both the cases,b we find that when the firms are given the freedom of entry and exit, the equilibrium price remains the same. The price is lower than that of the short run equilibrium price (Ps ); whereas, the long run equilibrium quantity (qL ) is more than that of the short run equilibrium quantity (qs). Similarly, for the leftward demand shift, it can be found that the short run equilibrium price (Ps ) is lower than the long run equilibrium
price and the short run equilibrium quantity (qs ) in less than the long run equilibrium quantity (Lq)


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