If you have a graph showing a monopolistic competitive situation in which demand shifts to the left in the long run but your graph only shows the MR curve in the short run, how do you figure out where the long-run MR line should go on the graph? (I have 2 demand curves (sr and lr), but only 1 MR curve (sr).  I think it would be to the left of MR sr, but don't know how to draw it. One would need to know this to figure out excess capacity and markup, right?

Exploring Economics
8th Edition
ISBN:9781544336329
Author:Robert L. Sexton
Publisher:Robert L. Sexton
Chapter14: Monopolistic Competition And Product Differentiation
Section: Chapter Questions
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If you have a graph showing a monopolistic competitive situation in which demand shifts to the left in the long run but your graph only shows the MR curve in the short run, how do you figure out where the long-run MR line should go on the graph? (I have 2 demand curves (sr and lr), but only 1 MR curve (sr).  I think it would be to the left of MR sr, but don't know how to draw it. One would need to know this to figure out excess capacity and markup, right?

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