>Except there is no such reliance on perfect information of all parties.
Exactly. The market is the decentralized method by which information is distributed.
>Straw-man
Yes, agreed. I wonder how much laissez-faire material some of these commenters have actually read. Perhaps they read from a different flavor of "market absolutism", which brings the question of unnecessary generalization.
In my reading of the Rothbardian ancap canon, insurance companies, liability for damages and private certification boards are advanced. Under this system imperfect information is taken as a given. Market participants like private food safety inspectors have an incentive to have better information than their competitors.
Contrast the above to the government regulation schemes where acceptable levels of adulterants are not necessary to report. Similarly, polluters can freely pollute within the EPA guidelines without liability. One could make the same leap of attributing "perfect information" to government regulators. If not for perfect information, how else can the FDA know the acceptable level of a contaminant?
Private regulatory and certification bodies would give consumers choices for cleaner standards than the government monopoly. I hope it goes without saying that the existence of a state backed regulatory body makes it harder for a private one to enter the market.
Finally, in response to the top level comment, it is worth noting that if a similar comment were made in favor of markets rather than regulation, one could reasonably expect it to be flagged into oblivion. Perhaps rightly so, because the topic has derailed the discussion. It speaks to the depth of the discussion when market opponents haven't even bothered to read what they are criticizing. HN isn't the place for this.