Last Friday we found out that the $150 computer Wal-Mart was selling was $180 in Wisconsin. Not the only item, either. They were forced to charge higher prices.
I'm not sure if they still have it, but in the early 80s Oklahoma had a 'minimum price' law to 'protect mom-n-pops' from undercut competition.
Walmart was just moving into the state and had a hard time because they wanted to offer prices lower than the state would allow.
By whom?