<p>I believe this is just a horizontal sum. At the very top of your graph, only adult has a part of its curve above 10.25. So when your summing horizontally student =0  Adult = x, This changes once you are below 10.25, then all of a sudden you have student = x  and adult = x. This additional amount from student causes the kink. If pretend student was always =0 then the total on the right would be identical to adult. </p>

<p>I hope this helped. I'm sorry if it's not phrased better. </p>

CC BY-SA 3.0
2017-04-05T15:30:21.293Z
This is the correct answer.
TheSaint321
CC BY-SA 3.0
2017-04-04T02:47:38.823Z
2017-04-04T02:47:38.823Z
Jarrod
<p><a href="https://i.sstatic.net/U8kzG.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/U8kzG.png" alt="third degree price discrimination market"></a></p>

<p>I know that the total MR = MR of student + MR of adult, but wy is it kinked at the top?</p>

<price-discrimination>
When there is a third degree price discrimination, why is the total MR curve kinked at the top?
Christy Ying
# When there is a third degree price discrimination, why is the total MR curve kinked at the top?

(Asked by: username_0 on 2017-04-02)

[![third degree price discrimination market](https://i.sstatic.net/U8kzG.png)](https://i.sstatic.net/U8kzG.png)

I know that the total MR = MR of student + MR of adult, but wy is it kinked at the top?

**Tags:** price-discrimination

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## 1 answers

### Answer by username_1 on 2017-04-04. Score: 4

I believe this is just a horizontal sum. At the very top of your graph, only adult has a part of its curve above 10.25. So when your summing horizontally student =0 Adult = x, This changes once you are below 10.25, then all of a sudden you have student = x and adult = x. This additional amount from student causes the kink. If pretend student was always =0 then the total on the right would be identical to adult.

I hope this helped. I'm sorry if it's not phrased better.

> **Comments:**
> **username_2**: This is the correct answer.  

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