Imagine you are the foreman of a factory. Inside the factory are two machines. Both machines consume materials, energy, and labor and produce the same product, perhaps cars, or toasters, or pencils. However, one of the machines, given the same inputs, produces far fewer of that product. Assume that inputs for maintenance to keep the machines running indefinitely are included in the consumption numbers. The question you need to answer as foreman is how to divide the resources between the two machines.The answer seems obvious: Put all your resources into the better machine! Some fraction of the resources put into the inefficient machine will be wasted, so unless your inputs are extremely abundant and the demand for products is exceedingly desperate, leave the inefficient machine alone and
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