Economics » Government Budgets and Fiscal Policy » Practical Problems with Discretionary Fiscal Policy

Long and Variable Time Lags

Long and Variable Time Lags

Monetary policy can be changed several times each year, but fiscal policy is much slower to be enacted. Imagine that the economy starts to slow down. It often takes some months before the economic statistics signal clearly that a downturn has started, and a few months more to confirm that it is truly a recession and not just a one- or two-month blip. The time it takes to determine that a recession has occurred is often called the recognition lag. After this lag, policymakers become aware of the problem and propose fiscal policy bills. The bills go into various congressional committees for hearings, negotiations, votes, and then, if passed, eventually for the president’s signature. Many fiscal policy bills about spending or taxes propose changes that would start in the next budget year or would be phased in gradually over time. The time to get a bill passed is often referred to as the legislative lag. Finally, once the bill is passed it takes some time for the funds to be dispersed to the appropriate agencies to implement the programs. The time to get the projects started is often called the implementation lag.

Moreover, the exact level of fiscal policy to be implemented is never completely clear. Should the budget deficit be increased by 0.5% of GDP? By 1% of GDP? By 2% of GDP? In an AD/AS diagram, it is straightforward to sketch an aggregate demand curve shifting to the potential GDP level of output. In the real world, the actual level of potential output is known only roughly, not precisely, and exactly how a spending cut or tax increase will affect aggregate demand is always somewhat controversial. Also unknown is the state of the economy at any point in time. During the early days of the Obama administration, for example, no one knew how deep in the hole the economy really was. During the financial crisis of 2008-09, the rapid collapse of the banking system and automotive sector made it difficult to assess how quickly the economy was collapsing.

Thus, it can take many months or even more than a year to begin an expansionary fiscal policy after a recession has started—and even then, uncertainty will remain over exactly how much to expand or contract taxes and spending. When politicians attempt to use countercyclical fiscal policy to fight recession or inflation, they run the risk of responding to the macroeconomic situation of two or three years ago, in a way that may be exactly wrong for the economy at that time. George P. Schultz, a professor of economics, former Secretary of the Treasury, and Director of the Office of Management and Budget, once wrote: “While the economist is accustomed to the concept of lags, the politician likes instant results. The tension comes because, as I have seen on many occasions, the economist’s lag is the politician’s nightmare.”


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