This doesn’t sound like an exciting topic, but I have been thinking, if the federal government decided to match metro-scale infrastructure projects say, between 25 cents and 75 cents on the dollar, and vary that amount based on economic conditions, what kind of trigger would you use for the economic conditions. My initial thought is to base it on unemployment – maybe 25 cents on the dollar if unemployment is below 5%, 50 cents if it is 5-7%, and 75 cents if it goes over 7%. But I just made that up based on no data other than a vaguely remembered undergraduate economics class in the 1990s. Here is a serious idea called the Sahm indicator:

The “Sahm indicator” measures the difference between the three-month moving average of the unemployment rate and its minimum over the prior 12 months (see chart). The use of the unemployment rate avoids the long lags (and frequent large revisions) associated with other indicators (like GDP). Since 1970, whenever the Sahm indicator crossed the threshold of 0.5%, a recession was underway―there were essentially no false signals. Moreover, the trigger occurred early in these downturns (on average within 4 months of the start). Sahm also proposes using an unemployment rate test to turn the stabilizers off. To avoid a premature return to fiscal austerity, she suggests deactivating programs when the unemployment rate falls to a level that is less than 2 percentage points above the initial trigger.

The infrastructure projects have to be ready to go, and part of plans, not just projects. Maybe you could set aside some of the money in a maintenance trust fund, which gets released to local metropolitan area governments to give them some relief in tough times. Maybe federal or state workers could be trained to do basic maintenance tasks. This is really the issue we saw after the 2007-2008 recession – how do you get people hired and trained and contracts and construction plans all in place fast enough to make a difference economically. It’s hard to do that and still build smart, thoughtful, future-ready infrastructure. But catching up on unglamourous deferred maintenance – think fixing potholes, lining leaky pipes, etc. could make sense.