Okay, call me dumb, but I don't get it. I looked up wikipedia, and I still don't get it. What, in economics, is analogous to fermions and quantum state?

Assertion: In any modern economical system, capacity exists to produce small houses for "everyone who wishes one".

Disproof: For certain possible values of "everyone", the Pauli Exclusion Principle prevents the simultaneous existence of a sufficient number of distinct small houses.

This is only true because classical economics are predicated on scarcity, much of which is artificial and shared inequally and inequitably.

Clint Eastwood's Pauli Exclusion Principle:

This energy state ain't big enough for the both of us.

Tell me, what in economics plays the role of identical particles?

Relative economic position of actors? Not sure if that's what ubernostrum was referring to.

Read grimtrigger's story in the HN comments. You'll get the idea rather quickly.