>"While systematic thinkers close a subject, leaving their followers with “normal” science to fill up the learned journals, fertile ones open their disciplines to critical scrutiny, for which they rarely get credit. Three recent biographies show how this has been the fate of three great economists who were marginalized by their profession."

LONDON – There are two types of extraordinary economist. The first type includes pioneers of the field such as David Ricardo, William Stanley Jevons, and, in our own time, Robert Lucas. They all aimed to economize knowledge in order to explain the largest possible amount of behavior with the smallest possible number of variables.