BRIEF-Regeneron Pharma shares resume trading, up 16 percent
NEW YORK May 1 (Reuters) - Regeneron Pharmaceuticals Inc : * Shares resume trading, up 16 percent * Shares as shares of Allergan slide after co says vision drug approval
likely delayed * Shares up 13.2 percent as shares of Allergan slide after co says
vision drug approval likely delayed
DAVOS, Switzerland - Central banks have done their best to rescue the world economy by printing money and politicians must now act fast to enact structural reforms and pro-investment policies to boost growth, central bankers said on Saturday.