Editing Mechanism design (section)

===Myerson–Satterthwaite theorem===
{{main|Myerson–Satterthwaite theorem}}

{{harvs|txt|last=Myerson|last2=Satterthwaite|year=1983|author-link=Roger Myerson}} show there is no efficient way for two parties to trade a good when they each have secret and probabilistically varying valuations for it, without the risk of forcing one party to trade at a loss. It is among the most remarkable negative results in economics—a kind of negative mirror to the [[fundamental theorems of welfare economics]].