The success of the Trump economy remains a bit of a mystery


It’s also possible, of course, that the tax cut has raised consumption by driving up aggregate demand. Paul Krugman has put this forward as an explanation. It’s also true that under Trump, deficits have risen to levels not seen since 2012.

But this is unlikely to have provided the economy with a major boost. First, the tax reform’s benefits flowed mostly to the wealthy. Wealthier people tend not to change their consumption much in response to changes in income, because unlike poor and middle-class people they have no pressing need to pay off their debts or buy necessities. Fiscal stimulus also tends to have much less of an effect when the economy is healthy than when it’s in recession. Thus, the tax cuts probably provided little stimulus while raising the deficit.

So if it wasn’t the tax reform, what’s keeping the recovery rolling along?

Low interest rates haven’t yet sparked a consumer borrowing boom; the ratio of household debt to gross domestic product remains at low levels and shows no signs of rising.

Trump might assert that his trade war helped. But exports didn’t go up during the past year. And if US consumers are shifting from imported goods to domestically produced ones, the shift is very minor.

The labour market is stronger than at any time except the late 1990s, with workers at the bottom of the income scale getting real wage increases.Credit:Erin McCracken

The recent weakness in business investment, especially in manufacturing, also suggests that the US is not benefitting from a wave of reshoring by multinational companies. Chinese labour costs have risen, and China has become a less attractive investment destination because of the trade war and Chinese government policies. But so far, companies are mostly just shifting their overseas production to other low-cost countries like Vietnam rather than bringing it back to the US.

The truth is, there’s no obvious driver of US growth. The most likely explanation is that the economy is simply in a phase of boring normality.

Most people tend to think of the business cycle as a series of alternating booms and busts. The US economic record seems to confirm this, with recessions coming at least once a decade. But while this is certainly possible, most macroeconomic models envision the economy as a production machine that just keeps chugging until some sort of shock disturbs it from equilibrium.

Since the end of World War II, there have been three main types of shocks that have thrown the US economy off kilter: financial bubbles and crashes, Federal Reserve interest rate hikes or big increases in oil prices. None of these are threatening now. The rise in risky leveraged lending doesn’t seem big enough to cause another financial crisis. Vivid memories of the crash of 2008 are probably preventing excessive speculation in stocks and housing, while the Dodd-Frank financial reforms and the scars of that disaster probably are holding back financial institutions from piling up excessive risks. Meanwhile, oil prices and gasoline prices are at moderate levels, and the Fed in 2019 reversed some of the interest rate increases of prior years. Much has been made of Trump’s trade war, but so far the real impact has been minor even in sectors such as agriculture.

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So US consumers simply have little reason to stop consuming. They’ve deleveraged since the crash, their homes are appreciating modestly in value, their wages are rising at a decent rate and their pensions are doing fine. Barring a new financial crisis, a major Chinese collapse, a sharp reversal of course from the Fed, or more dramatic meddling from Trump, the economy may simply keep sailing along.

Noah Smith is a Bloomberg Opinion columnist. He was an assistant professor of finance at Stony Brook University, and he blogs at Noahpinion.

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