**The Origin of the Ceteris Paribus Assumption**

The ceteris paribus assumption, also known as the "all else equal" assumption, is a fundamental concept in economics. It is a Latin phrase that means "other things being equal" or "holding all other things constant." This assumption is used to isolate the relationship between two variables by assuming that all other factors or variables remain constant.

The ceteris paribus assumption is considered to be a simplifying device used in economic analysis. It allows economists to focus on the relationship between two specific variables while holding other variables constant. By doing so, economists can analyze the impact of changes in one variable on another, without the interference of other factors.

**The Founders of the Ceteris Paribus Assumption**

The ceteris paribus assumption is not attributed to a specific individual, as it has been used by economists throughout history. However, it can be traced back to the early development of economic thought.

**Ancient Greek Economists**

The ancient Greek economists, such as Xenophon and Aristotle, recognized the importance of isolating variables in economic analysis. They understood that factors such as changes in technology, population, or government policies could complicate the analysis of economic relationships. Therefore, they made implicit use of the ceteris paribus assumption by focusing on specific aspects of the economy while assuming that other factors remained constant.

**Classical Economists**

The ceteris paribus assumption was further developed by classical economists such as Adam Smith, David Ricardo, and Thomas Malthus during the 18th and 19th centuries. They used the assumption to study the relationship between variables such as supply and demand, labor and wages, and population growth and resources. By holding other factors constant, they aimed to identify general economic principles and laws.

**Modern Economics**

The ceteris paribus assumption continued to be used by modern economists, including those associated with the neoclassical school of thought. Economists such as Alfred Marshall, who is considered one of the founders of modern economics, emphasized the importance of isolating variables to analyze economic relationships. The ceteris paribus assumption became a standard tool in economic analysis, allowing economists to build theoretical models and make predictions.

**Conclusion**

The ceteris paribus assumption is a fundamental concept in economics that allows economists to isolate the relationship between two variables by assuming that all other factors remain constant. While the assumption is not attributed to a specific individual, it has been used by economists throughout history, from ancient Greek thinkers to modern economists. By using the ceteris paribus assumption, economists can analyze the impact of changes in one variable on another and identify general economic principles and laws.