Individuals are influenced by which motivate them and encourage them to do things. is when buyers and sellers willingly engage in a mutually beneficial transaction.

Economists assume that everyone acts in their own by analyzing the benefits and costs of their decisions.

The idea that we all have unlimited wants but limited resources is called .

The concept that unintended social benefits arise from individuals acting in their own self interest is known as .

Buyers and sellers are meeting to exchange goods and services with no government intervention in a .