I can tell you that not all economists can agree on their methodologies or goals. Marxist and institutionalists do things rather differently from neoclassical economists, its just that unversities find it convenient to put them in the same departments. I suspect its the same wrt philosophy.
Economics is the study of how a society of human beings attempts to fulfill the wants and needs of its members with limited resources. Its goal is to improve our ability to better this fulfillment through the use of data collection and analysis of present and historical examples of functioning economies, simulation of postulated economies or of changes which could be introduced into real economies and the development of theories or models with strong explicative and predictive power.
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