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 Economists use a model in economics to analyze and visualize the economic problem. A model can be used for many purposes such as an explanation of the system or a calculating process. Many economists have their own specific definitions of a model in economics. The models in economics have the wide range of forms including graphs, diagrams, and mathematical models. Economists use these models in different purposes; it depends on many factors such as what type of raw data they have, how they can represent 

the data, and what they want from the model they use.Models are used widely in economic reports and researches. Importance of models in economics is not only tools for economists, but also how they use these tools; how to choose the right one. They separated econometrics as a branch of economics for further studies about models.