(Reuters) -Federal Reserve Bank of Boston President Susan Collins said on Thursday that Trump administration tariffs will drive up U.S. inflation but it is unclear how persistent that upward pressure will be. "It looks inevitable that tariffs are going to increase inflation in the near term" and it seems more likely than not right now the jump will be short-lived, she said in an appearance in Boston. But "there are risks" the higher price pressures could prove more enduring, she noted, and the details and reactions of those targeted by the tariffs matter a lot in determining how much prices will be affected.