There are considerable downside risks to what might happen in the wake of the referendum, but Brexit also presents some important upside opportunities for the UK. It will have the opportunity to take a freer hand in its own trade policy, its own immigration policy, its own regulatory policy, and there’s at least the possibility that it could do so in a more progrowth way than would likely have happened if it had remained part of the EU. If it takes advantage of that freedom to construct a regulatory environment that facilitates the formation of new businesses and the creation of new jobs, that’s likely to be good for workers across the spectrum in the UK economy.
On the other hand, if Brexit is really the first step toward an inward retreat with respect to trade, capital flows, immigration, and so on, that’s likely to choke off growth prospects for the UK for some time to come.
One big political issue is how well and how soon the EU and the UK will establish a new trade arrangement. The sooner the better, in my view. The Economic Policy Uncertainty Index for the UK is at historically high levels. (The Index quantifies newspaper coverage of policy-related economic uncertainty.) Until the EU and the UK come to a new understanding about trade in goods and services, capital flows, and financial relationships, that uncertainty will forestall long-term investments, hiring decisions, and other activity. That’s going to spill over to the entire UK economy if it persists for long.