Complex sentence: In addition, he has been a consultant to the Federal Reserve Banks of Chicago, Atlanta, and San Francisco, is a research associate at the National Bureau of Economic Research, and a fellow of the Econometric Society.
Split into simpler sentences: In addition, he has been a consultant to the Federal Reserve Banks of Chicago, Atlanta, and San Francisco. He is a research associate at the National Bureau of Economic Research, and a fellow of the Econometric Society.