Brexit and immigration

• Net inward migration from the EU has been running at record levels in recent years, although the steep increase in new National Insurance numbers issued suggests that the official data may be understating the level of immigration. There was a clear step up in inflows after both expansions of the EU into central and eastern Europe, while the relative strength of the UK labour market has been an important driver of the more recent rise in inflows.
• High levels of immigration have helped to offset the impact of an ageing population and ensured that the UK has enjoyed stronger labour supply growth than many of its peers. With migrants typically being better educated than their UK‐born counterparts, the quality of the stock of labour has also improved, and migrants have been found to have a net positive fiscal impact.
• But there have been some downsides, with evidence that high immigration has had a small dampening impact on wages. That migrants tend to head to London and the other southern regions over other destinations has exacerbated the imbalances in regional housing markets.
• Given that a desire to have greater control over immigration is usually one of the key motivations for those favouring Brexit, a vote in favour of leaving the EU is likely to see the UK abandon the policy of free movement of labour. This would probably see the UK extend the points‐based system that it currently uses for non‐EU countries to include EU migrants.
• Our modelling suggests that the adoption of a ‘populist’ immigration policy which lowers net inward migration by 60,000 a year could reduce the level of GDP by 1.1% in 2030 compared with our baseline forecast.