There's really no way this cannot be true, is there? Credit - Chris Mounsey, by permission

One of the complaints – a valid one as it happens – about Brexit is that the uncertainty over what will actually happen is preventing people from doing things. Uncertainty – as opposed to risk – being something that can’t be wished away nor insured, hedged, against. Thus, logically enough, we should stop having the uncertainty. Announce that we’re leaving come March, there will be no deal, we’ll crash out to WTO terms.

There, we’ve dealt with the uncertainty, haven’t we? That we’ve also got the best deal possible only adds to the joy of the solution:

Rising Brexit uncertainty has reduced investment and employment
Nicholas Bloom, Scarlet Chen, Paul Mizen 16 November 2018

The majority of businesses in the UK report that Brexit is a source of uncertainty. This column uses survey responses from around 3,000 businesses to evaluate the level and impact of this uncertainty. It finds that Brexit uncertainty has already reduced growth in investment by 6 percentage points and employment by 1.5 percentage points, and is likely to reduce future UK productivity by half of a percentage point.

Responses from the latest survey of around 3,000 businesses in the UK, using the Bank of England’s Decision Maker Panel (Bank of England 2018),1 give us four key findings about the level and impact of Brexit uncertainty.

Brexit is a major and growing source of uncertainty for firms

In August 2016, in response to the question, ‘How much has the result of the EU-referendum impacted the level of uncertainty affecting your business?’, more than one-third of CEOs and CFOs cited Brexit as at least one of the top three current sources of uncertainty. At the time, 10% said that Brexit was the most important factor and 25% said it was one of the top two or three sources of uncertainty (Figure 1).

Successive waves of this question have shown that firms continue to place Brexit high on the list of sources of uncertainty. The share of firms responding that Brexit was one of the top drivers of uncertainty rose from 35% in August 2016 to almost 40% in August-October 2017, while the share of companies considering Brexit not important in the same period fell from 27% to 16%. The proportion of firms reporting uncertainty has remained high and has increased further – Brexit uncertainty has not been resolved. By August-October of this year, around the time of the Salzburg summit, around half of firms were reporting Brexit as a top-three source of uncertainty.

Figure 1 Brexit as a source of uncertainty

Source: Authors’ calculations based on data from Decision Maker Panel.

Firms expect lower sales and exports and higher costs

Figure 2 shows the effects that companies expect Brexit to have on their sales, exports and costs. Companies place more weight on Brexit reducing sales than on it increasing them. On average, businesses expected Brexit to eventually reduce their sales by around 2.5% (Figure 2). There was also a net negative expected effect on exports, while unit costs, labour costs and financing costs were expected to increase.

Figure 2 Reported impact of Brexit on firms

Source: Authors’ calculations based on data from Decision Maker Panel.

Brexit has reduced investment and employment growth

To estimate the impact of Brexit uncertainty, we analysed the change in investment and employment for firms exposed to lower and higher levels of uncertainty. This difference-in-difference approach quantifies the effect that Brexit uncertainty has had on growth of investment and employment by firms. Our results show the uncertainty is associated with around 6 percentage points less investment. This reduction in investment appears to have happened mainly in the first year after the referendum, between July 2016 and June 2017. We also found that that there is 1.5 percentage points lower employment for these firms, with the effect being larger in the second year after Brexit (July 2017 and June 2018) than in the first.

Brexit has lowered UK productivity growth

Firms in the UK economy that export more to the EU, import more materials from the EU, and employ more labour from the EU were most uncertain and expected Brexit to eventually have a more adverse effect on their sales. They are also the firms that have the highest levels of productivity. We see from Figure 3 that more productive firms expect the eventual effect of Brexit on sales to be more negative (compared to the expected effect of less productive firms).

By a batting average effect, if Brexit reduces the sales of high-productivity firms by more than low-productivity firms that is likely to bring down average UK productivity. Our estimates suggest this implies about a 0.5 percentage point reduction in future productivity. Given that the UK economy has had very low productivity growth in the last decade (about 1% in the last few years), this effect is worth around half a year of productivity growth.

Figure 3 Expected eventual impact of Brexit on sales versus productivity

Source: Authors’ calculations based on data from Decision Maker Panel.


In this column we estimate that Brexit uncertainty (so far) has reduced in investment by 6 percentage points and employment by 1.5 percentage points, and is likely to reduce future productivity in the UK by half of a percentage point.

Brexit has not happened yet, and when it does, in March 2019, there could be further uncertainty over the transition arrangements and the arrangements that replace the negotiated settlement. This could lead to further employment, investment and productivity losses in the UK if policy is uncertain or increases trade costs.

Equally, there could be a Brexit dividend (a relief factor that conditions are not as bad as feared), and some postponed investment could be implemented if the conditions under which the UK trades with the EU warrant it. For this reason, it is essential to continue to monitor the effects of Brexit uncertainty on businesses. The effects could go either way.

Authors’ note: Bloom and Mizen have received £683,636 in the form of an ESRC standard grant for “Measuring the Impact of Brexit on UK Investment, Productivity, Sales and Employment”. The funding will support an online survey and research into the impact of Brexit on the UK for three years, 1 Sept 2017 – 31 August 2020. The project is carried out with the collaboration of Bank of England, the Universities of Nottingham (UK) and Stanford (US).