Website: https://nyingmainstitute.com/faculty/barr-rosenberg/ . Address: 855 Pretty View Lane, Sonoma, CA 95476 Barr Rosenberg, PhD is an acknowledged expert in the field of risk modeling and performance attribution. Dr. Rosenberg is the Founder of consulting group Barr Rosenberg Associates (also known as BARRA), which provides investment decision making tools that include indices and risk management analytics. Barr Rosenberg has been covered extensively in financial news and is occasionally available for specialized engagements.