An economy is a system of making and trading things of value. It is usually divided into goods (physical things) and services (things done by people). It assumes there is medium of exchange, which in the modern world is a system of finance. This makes trade possible. An economy encompasses all activity related to production, consumption, and trade of goods and services in an area. An economy applies to everyone from individuals to entities such as corporations and governments. An economy is the large set of inter-related production and consumption activities that aid in determining how scarce resources are allocated. The production and consumption of goods and services are used to fulfill the needs of those living and operating within the economy, which is also referred to as an economic system. An economy encompasses all activity related to production, consumption, and trade of goods and services in an area. An economy applies to everyone from individuals to entities such as corporations and governments. The economy of a particular region or country is governed by its culture, laws, history, and geography, among other factors, and it evolves due to necessity. For this reason, no two economies are identical.