经济行为是经济法律关系的主体为了行使权利或履行义务而进行的活动,是公民或法人旨在发生、变更、终止经济权利和义务而实施的行为。契约则是人们按自己的意志表示而结成的一种互为权利义务对象的社会关系。在商品经济年代,经济行为由最初的习惯规则转化 Economic activity is the main body of economic and legal relations The activities carried out in order to exercise rights or perform obligations are acts that citizens or legal persons are supposed to take, alter or terminate economic rights and obligations. The contract is a kind of social relationship that people form the object of their rights and obligations according to their own will. In the era of commodity economy, the economic behavior is transformed by the original customary rules