Northern Trust has appointed Carl R. Tannenbaum as its chief economist. He succeeds Paul Kasriel, who retired from Northern Trust earlier this year. Since 2008, Tannenbaum, 52, has served as senior vice president and head of the risk division at the Federal Reserve Bank of Chicago. Previously, he was chief economist and head of balance sheet management at LaSalle Bank/ABN AMRO. He received a bachelor¿s degree in finance and economics and an MBA from the University of Chicago.