Marshall's crime is to pretend to handle imperfect competition with tools only applicable to perfect competition.
Paul SamuelsonMacroeconomics, even with all of our computers and with all of our information - is not an exact science and is incapable of being an exact science.
Paul SamuelsonThe consumer, so it is said, is the king each is a voter who uses his money as votes to get the things done that he wants done.
Paul SamuelsonWhat counts is results, and there can be no doubt that the Soviet planning system has been a powerful engine for economic growth...The Soviet model has surely demonstrated that a command economy is capable of mobilizing resources for rapid growth.
Paul SamuelsonThe failure of market catallactics in no way denies the following truth: given sufficient knowledge the optimal decisions can always be found by scanning over all the attainable states of the world and selecting the one which according to the postulated ethical welfare function is best. The solution 'exists'; the problem is how to 'find' it.
Paul Samuelson