A PLEDGE by the G20 to reform the fund’s governance soon may convince them that the leopard has changed its spots. This week Mexico secured a $47 billion credit line with the fund, with no strings attached, which may set a trend. Eswar Prasad of the Brookings Institution believes the commitment to reform is credible. His evidence is that China has agreed to chip in $40 billion, prior to any changes to its voting power in the IMF (it has the same heft as Belgium). Others, however, remain skeptical. “This is still supply chasing demand,” says Arvind Subramanian of the Center for Global Development.