When the zero lower bound on nominal interest rates binds, monetary policy cannot provide appropriate stimulus. We show that in the standard New Keynesian model, tax policy can deliver such stimulus at no cost and in a time-consistent manner. There is no need to use inefficient policies such as wasteful public spending or future commitments to inflate. We conclude that in the New Keynesian model, the zero bound on nominal interest rates is not a relevant constraint on both fiscal and monetary policy.

The "Great Recession" and the ensuing weak recovery have led the Federal Reserve (Fed) to re-evaluate its monetary policy. Since December 2008, overnight interest rates have been near zero; at this "zero bound," they cannot be lowered further to stimulate the economy. As a result, the Fed has taken unprecedented policy steps to try to fulfil its statutory mandate of maximum employment and price stability. Congress has oversight responsibilities for ensuring that the Fed's actions are consistent with its mandate. This book analyses the economic effects of these programs, the current economic context in which these policies have been adopted, policy alternatives that the Fed has not pursued to date and their potential effects, potential legislative options for restricting the Fed's pursuit of unconventional monetary policy, and issues surrounding the eventual "exit strategy" from unconventional policy.

Unconventional fiscal policy uses announcements of future increases in consumption taxes to generate inflation expectations and accelerate consumption expenditure. It is budget neutral and time consistent. We provide preliminary evidence for the effectiveness of such policies using changes in value-added tax (VAT) and household survey data for Poland. We find households increased their inflation expectations and willingness to purchase durables before the increase in VAT. Future research has to ensure income, wealth effects, or intratemporal substitution channels cannot explain these results and ideally exploit exogenous variation in VAT in a fixed nominal interest rate environment.

The success over the years in reducing inflation and, consequently, the average level of nominal interest rates has increased the likelihood that the nominal policy interest rate may become constrained by the zero lower bound. When that happens, a central bank can no longer stimulate aggregate demand by further interest-rate reductions and must rely on "non-standard" policy alternatives. To assess the potential effectiveness of such policies, we analyze the behavior of selected asset prices over short periods surrounding central bank statements or other types of financial or economic news and estimate "noarbitrage" models of the term structure for the United States and Japan. There is some evidence that central bank communications can help to shape public expectations of future policy actions and that asset purchases in large volume by a central bank would be able to affect the price or yield of the targeted asset.

This paper addresses three questions about unconventional monetary policies. First, what policies were tried, and with what objectives? Second, were policies effective? And third, what role might these policies continue to play in the future?

We show that in a New Keynesian model with household heterogeneity, fiscal policy can be a perfect substitute for monetary policy: three simple conditions for consumption taxes, labor taxes, and the government debt level are sufficient to induce the same consumption and labor supply of each household and, thus, the same allocation as interest rate policies. When monetary policy is constrained by a binding lower bound, a currency union, or an exchange rate peg, fiscal policy can therefore replicate any allocation that hypothetically unconstrained monetary policy would generate.

This paper questions unconventional fiscal policy effects when the monetary policy rate is at the zero lower bound. We provide evidence for the US that the spread between the policy rate and the US-LIBOR, which is more relevant for private sector transactions, increases with government expenditures. We introduce a corresponding spread into an otherwise standard macroeconomic model which reproduces this observation. The model predicts that the fiscal multiplier takes conventional values, regardless of whether the policy rate follows a standard feedback rule or is at its zero lower bound. Likewise, labor tax increases exert contractionary effects in both cases.