For instance, an insurance company has a

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pool of 1000 randomly selected subscribers, each paying $100 per month. Insurance automatically ends when the odometer limit (recorded on the car’s insurance ID card) is reached unless more miles are bought. More recently, the use of experimental methods in economics has greatly expanded, challenging a historically-noted differentiating feature of some natural sciences from economics.[50] Expositions of reasoning within economic models often use two-dimensional graphs to represent theoretical relationships