Kevin Warsh, a member of the Federal Reserve Board, voiced concern about the central bank's willingness to bolster the economy by buying more government bonds or mortgage debt. The idea has been considered as fear continues that the economic recovery will falter. "Any judgment to expand the balance sheet further should be subject to strict scrutiny," Warsh said, as he outlined four lessons learned from the financial crisis. "I would want to be convinced that the incremental macroeconomic benefits outweighed the costs."

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