✓ Verified in The Quotable Mises
From The Quotable Mises — surrounding passage
Economic Freedom and Interventionism , p. 154 In the same way in which it is impossible for a mathematician to specialize in triangles and to neglect the study of circles, it is impossible to be an expert on wage rates without at the same time mastering the problems of profits and interest, commodity prices, and currency and banking. Economic Freedom and Interventionism , p. 234
“There are only economists and laymen. There are no such things as labor economists or farm economists.”
Economic Freedom and Interventionism , p.