From the summary:
According to the Business Cycle Dating Committee of the National Bureau of Economic Research (NBER), the U.S. economy has been in recession since December 2007. Congress passed and the President signed an economic stimulus package, the American Recovery and Reinvestment Act of 2009 (P.L. 111-5), in February 2009. The $787 billion package included $286 billion in tax cuts to help stimulate the economy. Among the tax reductions, many were tax incentives directed to business. The preliminary estimate of third quarter real gross domestic product (GDP) growth is 2.8%; the unemployment rate, a lagging indicator, averaged 9.6% in the third quarter and 10.0% in the fourth quarter of 2009. Federal Reserve Chairman Ben Bernanke expects the economy to continue growing at a modest pace, but predicts that bank lending will remain constrained and the job market will remain weak into at least 2010. To further assist unemployed workers, help business, and stimulate housing markets, Congress passed the Worker, Homeownership, and Business Assistance Act of 2009 (P.L. 111-92). The Obama Administration has advocated further business tax incentives to spur investment and employment, especially for small business.
The two most common measures to provide business tax incentives for new investment are investment tax credits and accelerated deductions for depreciation. The evidence, however, suggests that a business tax subsidy may not necessarily be the best choice for fiscal stimulus, largely because of the uncertainty of its success in stimulating aggregate demand. If such subsidies are used, however, the most effective short-run policy is probably a temporary investment subsidy. Permanent investment subsidies may distort the allocation of investment in the long run.