Abstract One characteristic feature of central banks today is that policy decisions are almost exclusively made by a committee rather than by a single policy maker. Another is that central banks endeavour to be transparent. Together, this has brought to the fore an important but so far...

One characteristic feature of central banks today is that policy decisions are almost exclusively made by a committee rather than by a single policy maker. Another is that central banks endeavour to be transparent. Together, this has brought to the fore an important but so far unresolved issue:...