This week, the excellent Lately podcast has an episode on price discrimination, in which cohost Vass Bednar valiantly tries to give economists their due by presenting the strongest possible case for charging different prices to different customers:
https://www.theglobeandmail.com/podcasts/lately/article-the-end-of-the-fixed-price/
Bednar really tries, but - as she later agrees - this just isn't a very good argument.
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