FRANKFURT/BRUSSELS--Christine Lagarde took a major step towards becoming the European Central Bank's next president on Wednesday, securing the backing of a European Parliament committee after pledging to keep policy loose while undertaking a broader strategy review.


  Lagarde, who is due to take over from Mario Draghi on Nov. 1, argued that persistently low inflation requires prolonged stimulus. But she also acknowledged that economies have changed in the last decade, with new challenges including climate change warranting a deep dive into how policy is conducted.
  Unprecedented shocks have forced the ECB to reinvent its toolkit over the past decade. It has now exhausted many of the unconventional measures at its disposal without lifting inflation back to its target of almost 2 percent.
  "2003 was a long time ago and many things have changed as far as the ECB is concerned," Lagarde told the European Parliament's committee on economic affairs, referring to the ECB's last broad strategy review.
  "My strong belief is that the cost-benefit analysis (of policy) and possibly a review of the monetary framework that would have to be conducted, not just by the ECB, but also in coordination with other central bank institutions from around the world, is warranted, given the circumstances," she said.
  With Parliament's backing, Lagarde now awaits final confirmation by euro zone leaders sometime in mid-October, a formality as the bloc appears united in supporting her nomination.
  Acknowledging that the ECB's primary role is to maintain price stability, Lagarde went out of her way to emphasize the institution's role in combating climate change. "My personal view is that any institution has to actually have climate change risk and protection of the environment at the core of their understanding of their mission," Lagarde said. "Primary mandate is price stability, of course. But it has to be embedded that climate change and environmental risk are mission-critical."
  Asked if she was prepared to be as bold as Draghi when he promised in 2012 to "do whatever it takes" to save the euro, Lagarde said that having to make such a pledge would mean others, including governments, had failed to prop up growth. "I hope I never have to say something like that. I really do. Because if I had that it would mean that the other economic policymakers are not doing what they have to do," she said.
  Lagarde largely avoided commentary on current policy but argued that a prolonged period of ultra-easy policy is necessary given global challenges, weak growth and uncomfortably low inflation. But she said the ECB should also be mindful of the negative side-effects of unconventional measures.