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Robert Solow reportedly remarked that when Paul Samuelson switched from the field of physics to the field of economics, the average IQ of both disciplines went up
Robert Solow reportedly remarked that when Paul Samuelson switched from the field of physics to the field of economics, the average IQ of both disciplines went up.
Based on what you know about how marginal changes affect averages, is Samuelson's IQ higher or lower than the average in the field of physics?
Is it higher or lower than the average in the field of economics?
Expert Solution
If Samuelson came into the field of economics and the average IQ of the practitioners in that field went up, then Samuelson has an IQ greater than that of the average in economics. The IQ of physics increased after Samuelson left; therefore, his IQ is lower than the average physicist.
In these situations, the change in Samuelson's presence in the field is the marginal IQ. When the marginal IQ is greater than the average, the average increases, and when the marginal value is lower than the average, the average decreases.
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