Which group creates regulations in mixed-market economies?

It is the government who creates regulations.  They make sure that that producers follow the laws and they create laws to ensure fair competition as well as prevent the rise monopolies and cartels who tend to dictate how the economy runs.

answer

assumes government exists in order to improve society

explanation

libertarians is the political organization which respects you as a unique and responsible individual.

libertarianism is a philosophy advocating minimal state intervention in the lives of citizens.it respects individuals responsibilities and opposes interference into the citizens individual rights in their families or even in their business decisions.the aim and believe of libertarianism is to see that the government that exists or which is in power improves the lives of the citizens.the key concepts of libertarianism are individualisms,natural harmony of interests, peace individual rights among others.

explanation: idk idk