When research is conducted in educational settings with children, when is the assent of potential student subjects required?

The united states economy is one in which producers are generally free to produce what they want and consumers are free to purchase what they desire, so long as no laws are broken. at the same time, however, the government does regulate some aspects of the economy. the u.s. can best be described as which of the following a mixed economy b liberated economy c command economy d market economy

Describe some effects of the rise of communism in the soviet union?

What did economist john maynard keynes believe about deficit spending?