Explanation:

- Dual economy: This term generally refers to an economy that is divided into two sectors—typically a modern industrialized sector and a traditional agricultural sector. Both sectors may coexist but have different levels of productivity and characteristics.

- Mixed economy: Features elements of both capitalism and socialism. While there is some private ownership, the government also plays a role in managing resources and intervening in the economy.

- Socialist economy: Characterized by government or collective ownership of the means of production. The focus is on equal distribution of wealth and resources.

- Capitalist economy: Private ownership of the means of production is a defining feature. Individuals can own resources and operate businesses for profit.