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→An example: Prisoner's dilemna
!rowspan=2 style="padding:6px 6px 6px 30px"|''A''
!rowspan=2 style="padding:6px 6px 6px 30px"|''A''
|style="border-style:solid; border-width:1px; padding:6px"|1
|style="border-style:solid; border-width:1px; padding:6px"|1
|style="border-style:solid; border-width:1px; padding:6px"|A: bad / B: bad
|style="border-style:solid; border-width:1px; padding:6px"|A: good / B: good
|style="border-style:solid; border-width:1px; padding:6px"|A: bad / B: good
|style="border-style:solid; border-width:1px; padding:6px"|A: bad / B: very good
|-
|-
|style="border-style:solid; border-width:1px; padding:6px"|2
|style="border-style:solid; border-width:1px; padding:6px"|2
|style="border-style:solid; border-width:1px; padding:6px"|A: good / B: bad
|style="border-style:solid; border-width:1px; padding:6px"|A: very good / B: bad
|style="border-style:solid; border-width:1px; padding:6px; background:#999999"|A: good / B: good
|style="border-style:solid; border-width:1px; padding:6px; background:#999999"|A: OK / B: OK
|}
|}
</div>
</div>
In the case shown at the right side, participants A and B can choose between "1" and "2". The result can either be "good" or "bad".
In the case shown at the right side, participants A and B can choose between "1" and "2". The result can either be "very good", "good", "OK", or "bad".
The highlighted field ("2/2") is the Pareto optimal situation. All other situations can be improved.
The highlighted field ("2/2") is the Pareto optimal situation. All other situations can be improved.
For example, in "1/2" ("bad" for A, "good" for B), A could switch to "2". The result improves A's result to "good" while leaving B's result unchanged.
For example, in "1/2" ("bad" for A, "good" for B), A could switch to "2". The result improves A's result to "good" while leaving B's result unchanged.
{{clear}}
{{clear}}
==External links==
==External links==
*[http://wilcoxen.cp.maxwell.syr.edu/pages/225.html Pareto Efficiency] by Peter J. Wilcoxen
*[http://wilcoxen.cp.maxwell.syr.edu/pages/225.html Pareto Efficiency] by Peter J. Wilcoxen