What if demand curves sloped upward?

Tyler Cowen:

Let us say, just for fun, that you woke up one morning to a world where everyone else's demand curve -- except yours -- slopes upward.  But it is not common knowledge that  this is the case.  What is the first oddity you would notice? 

1. The most expensive radio stations would be filled with the most ads.  The music would never come.

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