
Lenny D. answered 12/11/19
Former professor of economics at Tufts University
For the first part think about this. You want to buy something that will be either really good or just ok.. On average you will get something that is Pretty good.. The People that produce something that is really good will only be offered a pretty good price. Firms providing only an ok good will also be offered a pretty good price. So the price of the really good price will be lower than it would be if consumers could see the quality difference.
For the second question The efficient allocation of resources requires the value of the marginal products = their respective prices which does not depend upon who owns the resources. That is, the best way to use resources does not depend upon who owns them
If you need help I am available for sessions.
Lenny