Herbert Simon

an American political scientist whose research ranged across the fields of cognitive psychology, computer science, public administration, economics, management, and philosophy of science sociology and a professor, most notably, at Carnegie Mellon University. With almost a thousand, often very highly cited publications, he is one of the most influential social scientists of the 20th century. (Social Science)

http://en.wikipedia.org/wiki/Herbert_Simon

Cosma Shalizi: http://bactra.org/notebooks/simon.html