$3

clipped from taxprof.typepad.com When devising its fiscal package, the Obama administration relied on conventional economic models based in part on ideas of John Maynard Keynes. Keynesian theory says that government spending is more potent than tax policy for jump-starting a stalled economy. The report in January put numbers to this conclusion. It says that an extra dollar of government spending raises GDP by $1.57, while a dollar of tax cuts raises GDP by only 99 cents. But various recent studies suggest that conventional wisdom is backward. One piece of evidence comes from Christina D. Romer, the chairwoman of the president’s Council of Economic Advisers. In work with her husband, David H. Romer, written at the University of California, Berkeley, just months before she took her current job, Ms. Romer found that tax policy has a powerful influence on economic activity. According to the Romers, each dollar of tax cuts has historically raised G.D.P. by about $3