Complex sentence: He is best known for his research on the US Congress and agency theory and received a B.A. from University of California, Irvine and a M.S. and Ph.D. from California Institute of Technology.
Split into simpler sentences: He is best known for his research on the US Congress and agency theory. He received a B.A. from University of California, Irvine and an M.S. and Ph.D. from California Institute of Technology.