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Economists are concerned with how society uses resources such as land, labor, raw materials, and machinery to produce goods and services for consumption and production in the present and future. Economists study how economic systems address three basic questions: "What shall we produce?" "How shall we produce it?" and "For whom shall we produce it?" The economist then compiles, processes, and interprets the answers to these questions. There are about 17,230 economists employed in the United States.