What was the impact of wwii on domestic affairs?

American and domestic foreign policy during World War 2 were linked in that once America entered the war it had a significant impact on its economy. ... It was Hitler who declared war on the USA. Prior to that American domestic politics were dominated by the arguments between interventionism and isolationism.

high entry costs prevent new producers from entering the market.

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.