Rob Subbaraman is preparing for his second Trump presidency with a new accessory in his economist toolkit: The head of global markets research at Nomura Holdings has downloaded Truth Social, the President-elect¡¯s conservative social media platform.

¡°I¡¯m going to get in trouble with my kids,¡± said Subbaraman, who¡¯s been in his current role in Singapore for a decade. ¡°I tell my kids in the evening to switch off all their devices, but I¡¯ve got to be on. I don¡¯t know what Trump is going to do or when he¡¯s going to do it.¡±

The job has just gotten a whole lot more unpredictable ¡ª again ¡ª for economists, a typically staid bunch who rely on precedents to build the formulas and spreadsheets that underpin their forecasts. Donald Trump¡¯s first presidency complicated that approach, and his campaign pitch and the appointments he¡¯s made since sweeping the Nov. 5 election suggest yet more upheaval for trade, tax, immigration and just about every other policy area you can think of.