Via Coyote Blog: Protecting the Consumers from Low Gas Prices and The Mises Blog, this great poem by R.W. Grants, the Incredible Bread Machine, includes this stanza:
"These very simple guidelines,
You can rely upon:
You're gouging on your prices if
You charge more than the rest.
But it's unfair competition if
You think you can charge less!
"A second point that we would make
To help avoid confusion...
Don't try to charge the same amount,
That would be Collusion!
You must compete. But not too much,
For if you do you see,
Then the market would be yours -
And that's Monopoly!