For years, economists, including no less than former Fed chair JanetYellen, talked about the concept of "asymmetric risk," or AR. In this earlier context, which related to monetary policy, AR maintained that the risk of weak demand was greater than that of faster inflation. Therefore, the full-employment side of the Fed's mandate should get more weight in interest rate decisions than the stable-prices part.
With some important caveats I'll get to below, there's a new AR in town, this time as regards fiscal policy. As I've written in manyplaces, thanks to the deficit-financed tax cuts and new spending bill, the deficit as a share of GDP is going to be unusually large, given that we're likely closing in on full employment.
As John Cassidypoints out, some analysts, quite reasonably, worry that stimulating an economy so close to full employment is a basic economic mistake. It's being more Keynesian than Keynes. Such stimulus won't deliver more real economic activity, like jobs or real wage growth. It will just deliver more inflation and higher interest rates, which we slow growth. Added fiscal impulse at this point, they fear, will add more heat than light.
I share their concerns, but I think AR is in play, which points towards supporting this fiscal experiment. Once again, the risk of insufficient aggregate demand is greater than that of overheating. Let me explain.
You may be thinking: "insufficient demand!? But the economy is clearly at full utilization!"
Here's the thing about that: neither you nor I know that to be the case. The first figure below shows that it is beyond our ability to identify the lowest unemployment rate commensurate with stable inflation. The next figure is trickier but it's explained in this important newpaperfrom our Full Employment Project that recalculates potential GDP, or GDP at full utilization. The thick, bottom line is actual GDP relative to its 2007 level and the middle clump of lines are the relevant re-estimates, using an arguably better technique. They show that there's maybe 5 percent of GDP more untapped capacity than the conventional wisdom suggests.
Forthcoming, Bernstein, 2018.
Source: Coibion et al.
Meanwhile, inflation, which is the main risk of overheating, has been too low for too long. The Fed has missed its 2 percent inflation target to the downside for years running.
Ergo, given that we cannot confidently assert that we are at full employment or full capacity, that there are still people left behind, that wage trends and employment rates for some groups of workers are still on the mend, that inflation remains low and below target, and that if it did speed up, the Fed has ample room to hit the brakes, this hyper-Keynesian experiment is worth undertaking.
OK, caveat time, and there are good ones which I take seriously.
–It's not just faster inflation we should worry about.It's also higher interest rates, which could slow down growth and hurt the real variables we care about. As debt investors sniff wage and price pressures, they've insisted on higher inflation premiums. As I write, the yield on the 10-year Treasury is up about 40 basis points this year, at about a 4-year high. For years, the evidence for bigger deficits nudging up interest rates was nowhere to be seen. But that could be changing, and if so, the AR becomes less A and more balanced.
–This particular fiscal stimulus has lousy multipliers.Some of the spending in the budget deal may end up supporting useful infrastructure projects and providing much needed disasterrelief—worthy expenditures that could help tighten the job market in places where it's still slack. But the regressive tax cut is terribly targeted, and any fiscal stimulus is less potent when the Fed is pushing in the other direction, albeit slowly. So even if the AR scenario is correct, the bang-for-the-buck here is sure to be weak.
–Even if this AR scenario is in play this year, it may not be next year. The fiscal impulse from all this spending is, by some estimates, about the same both this year and next (Alec Phillips at Goldman Sachs finds that the growth impact should be about an extra 0.7 percentage points in 2018 and 0.6 points in 2019; no link). So, if added fiscal impulse doesn't trigger overheating in 2018, it could do so in 2019.
In sum, asymmetric risk doesn't mean no risk. And given the unusual, pro-cyclical timing of all this spending and tax cuts, the risks engendered by these fiscal dynamics are unquestionably worth watching out for. But if this extra spending can knock the unemployment rate down to the mid-3's by the end of this year without triggering more than the expected and manageable amount of price and rate pressures, then, from the perspective of those who've yet to benefit from full employment, it will be worth it.