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The effect of low-skilled immigration on Britain's productivity

The effects of low-skilled immigration into the UK may be more complicated than many people think, says James Lewisohn.

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The UK has welcomed immigrants from all over the EU

It's been a politically busy week, so like the majority of our politicians, we could be forgiven for missing a coda to September's Migration Advisory Committee report on immigration to the UK from Europe.

The report was much commented on, largely because it claimed that European migration into the UK has caused only "small impacts" to our economy compared to many other events such as the post-Brexit Referendum devaluation of sterling, for example.

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Overall, its main takeaway appeared to be that the many immigrants to the UK from the EU (who arrived in waves, first after we opened our borders to Eastern European states in 2004, and again during the economic crisis from 2008 onwards) have made a much more fiscally positive contribution to the UK than immigrants from elsewhere.

This conclusion fitted nicely with the views of most politicians and journalists and so generated a good few headlines along the lines of "Immigration myths that fuelled Brexit blown apart" (the Independent). But is the conclusion really so simple? It seems not.

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Last Tuesday, the Committee's chair, the LSE's Professor Alan Manning, gave evidence to the Home Affairs Select Committee (a third of whose members were too busy to attend). The SNP's Stuart McDonald MP asked the important question: given the research, he asked, should the conclusion just be that the best thing for the UK to do would be to "just carry on with free movement of people" from the EU?

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The answer was a surprise. No, replied Professor Manning. He and his team had, regrettably, failed to synthesise their argument. "It's all in there but it's not brought together in one place", he apologised. What they actually meant, he explained, is "that lower-skilled migrants have been fiscally-negative [] They make the UK a slightly lower wage, lower productivity kind of economy. Any effects that they have on innovation are not positive... And, basically, if you say, and what have been the benefits of this lower-skilled migration, there isn't very much on the positive side of the ledger."

"That doesn't come through very much in your report, as you say", said Mr McDonald. And indeed, it doesn't. But it is very very important.

If Professor Manning's conclusion is correct (and a lot of work has gone into it) then he may just have put the UK's 14-year debate over the EU's bedrock principle free movement of labour to bed.

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By the time of the EU referendum, the UK had seen more EU immigration (and vastly more low-skilled immigration) than any other country it has, for example, been the primary reason why the UK's foreign-born population, rose from 8.6% in 2003 to 12.3% even at a time when major economies such as Germany and Italy actually saw their foreign-born populations slightly contract.

If, as many have argued, that has come with huge fiscal benefits for the UK it isn't necessarily a bad thing. But if it has not, as seems to be the case, a more restrictive policy post Brexit might be a very good idea. It could, for example, force Britain's employers of low-wage labour to invest in greater automation, leading to greater productivity (this by the way is already happening even in advance of Brexit) and to real wage growth. That, surely, would be a result welcomed by both sides of the Brexit debate.

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