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Fed's Williams: inflation targets work, but room for improvement

San Francisco Federal Reserve Bank President John Williams speaks during an interview with Reuters reporters in the Washington bureau, October 14, 2014. REUTERS/Stelios Varias

(Reuters) - A top Federal Reserve policymaker on Friday said global central banks have had good success with inflation-targeting, but should consider other methods that may work better in the face of low interest rates and the risk of asset bubbles.

While San Francisco Fed President John Williams was careful to say he was not advocating either of the approaches he discussed - price-level targeting and nominal-income targeting - both imply even easier monetary policy than what the Fed has used as it has battled low inflation since the Great Recession.

His comments came just two days after the U.S. central bank ended its controversial bond-buying stimulus and upgraded its assessment of the labor market, laying the groundwork for the Fed to tighten monetary policy sometime next year.

Williams is seen as a centrist policymaker whose views are largely aligned with Fed Chair Janet Yellen. His remarks, prepared for delivery to a conference held at the South African Reserve Bank, did not include comments on his outlook for the U.S. economy or monetary policy.

Most major central banks, including the Fed, currently aim at a longer-term inflation rate of 2 percent to 3 percent.

That approach, first adopted 25 years ago by New Zealand's central bank, has been "remarkably successful at providing a nominal anchor and keeping inflation low and relatively stable during a period of severe turbulence," Williams said. "Nonetheless, recent events have revealed some chinks in the armor of inflation targeting."

Boosting inflation to acceptable levels is hard to pull off when interest rates are near zero, he said, as they are now and as they may be more often in the future, given slowdowns in productivity and other drags on economic growth.

That has been an ongoing challenge in the United States, where inflation has lingered below the Fed's 2-percent target for years, despite the central bank's extraordinarily accommodative monetary policy.

A second challenge is the ongoing risk of housing, debt, or other bubbles fueled by low interest rates. While central banks may want to raise rates to protect against such risks, he said, doing so would also lower inflation, a potentially costly move if inflation expectations are already low.

Given those two challenges, he said, price-level targeting and nominal-income targeting "may have some advantages" over inflation targeting, he said. Under price-level targeting, a central bank allows inflation to run hot for a time to make up for periods when the economy labored under too-low inflation.

Under nominal-income targeting, the Fed targets a path for GDP. Both approaches can protect against debt-fueled booms and busts, he said.

Still, he said, "it's too early to judge" whether either would be better than inflation targeting, and they could have unintended negative consequences or could be difficult to carry out because they are hard to explain.

(Writing by Ann Saphir; Editing by Chizu Nomiyama)