Similarly, such a targeting policy can help the economy accommodate both positive and negative supply shocks, while minimizing collateral damage. The leading proponent was Scott Sumner, with his blog "The Money Illusion." Supporters included Lars Christensen, blogging at "The Market Monetarist", Marcus Nunes at "Historinhas" David Glasner at "Uneasy Money", Josh Hendrickson at "The Everyday Economist", David Beckworth at "Macro and Other Market Musings" and Bill Woolsey at "Monetary Freedom." Support As of fall 2011, the number and influence of economists who supported this approach was growing largely the result of a blog-based campaign by several macroeconomists. Larry Kudlow, James Pethokoukis and Tyler Cowen advocate NGDP targeting. Australian economist John Quiggin supports nominal income targeting, on the basis that "A system of nominal GDP targeting would maintain or enhance the transparency associated with a system based on stated targets, while restoring the balance missing from a monetary policy based solely on the goal of price stability." Supporters of nominal income targeting often self-identify as market monetarists, although market monetarism encompasses more than nominal income targeting. Among policymakers, Vince Cable, ex United Kingdom Business Secretary, has described himself as "attracted" to nominal income targeting, but declined to elaborate further. Charles L. Evans, president of the Federal Reserve Bank of Chicago, said in July 2012 that "nominal income level targeting is an appropriate policy choice" because of what he claimed was its "safeguard against an unreasonable increase in inflation." However, "recognizing the difficult nature of that policy approach," he also suggested a "more modest proposal" of "a conditional approach, whereby the federal funds rate is not increased until the unemployment rate falls below 7 percent, at least, or until inflation rises above 3 percent over the medium term." Few academic publications analyze nominal income targeting. One study argues that similar monetary policy performs better than real income targeting during crises based on a theoretical model. In June 2015, Lawrence Summers seemed to suggest that NGDP targeting was a more powerful policy tool than a higher inflation target, although he did not endorse the progressive monetary policy. As Summers notes, setting a target which does not depend on inflation adjustments is more reasonable, and NGDP targeting guarantees that when a real growth rate is low real rates become low. David Beckworth, a long-time proponent of NGDP targeting, produces a brief each quarter to describe the stance of monetary policy in the United States.