IT IS not clear precisely how Donald Trump will govern, the extent to which he will carry out some of his scarier promises on trade and immigration, and who will be his economics top brass at the Treasury and in the White House. But a decent first guess is that President Trump will be bad for the world economy in aggregate; and a second is that his actions are likely to do more harm, in the short term at least, to economies outside America.
When America has in the past stepped aside from its role at the centre of the global economic system, the damage has spread well beyond its borders. In 1971, when Richard Nixon ended the post-war system of fixed exchange-rates that had America at its centre, his Treasury secretary, John Connally, told European leaders, “The dollar is our currency, but your problem.” This election result, to paraphrase Connally, belongs to America but is potentially a bigger economic problem for everyone else.
The scale and nature of that problem depend on the interplay of the two main elements of Mr Trump’s economic populism. The first is action to boost aggregate demand. Mr Trump favours tax cuts and extra public…
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