I am an economist on sabbatical from the Bank of England, where my most recent job was as Head of International Research. I am currently working on consulting projects and as a part-time Research Associate at the Resolution Foundation and visiting fellow at the LSE Centre for Macroeconomics. I have also worked as an economist for the United Nations Mission in Kosovo and the Independent Commission on Banking (the ‘Vickers Commission’), and as Research Director at WorldRemit and Founders Pledge.
In 2015 I received my PhD in economics from LSE under the supervision of Silvana Tenreyro. I have broad theoretical and empirical research interests in the macroeconomics of demographic and structural change, macroeconomic policy, financial stability, and inequality and distribution. I have taught macroeconomics at Cambridge (final-year undergraduate supervisions), international finance at LSE (PhD field course lectures), and several substantial technical assistance programmes in the Kosovo Ministry of Economy and Finance.
My email address is gregorythwaites 'at' gmail.com
'The Impact of Brexit on UK Firms' SIEPR WP 19-019, August 2019 (with Nick Bloom, Philip Bunn, Scarlet Chen, Paul Mizen and Pawel Smietanka) (Bank of England WP 818) (Financial Times) (Economist) (Vox EU)
Abstract: We use a major new survey of UK firms, the Decision Maker Panel, to assess the impact of the June 2016 Brexit referendum. We identify three key results. First, the UK’s decision to leave the EU has generated a large, broad and long-lasting increase in uncertainty. Second, anticipation of Brexit is estimated to have gradually reduced investment by about 11% over the three years following the June 2016 vote. This fall in investment took longer to occur than predicted at the time of the referendum, suggesting that the size and persistence of this uncertainty may have delayed firms’ response to the Brexit vote. Finally, the Brexit process is estimated to have reduced UK productivity by between 2% and 5% over the three years after the referendum. Much of this drop is from negative within-firm effects, in part because firms are committing several hours per week of top-management time to Brexit planning. We also find evidence for smaller negative between-firm effects as more productive, internationally exposed, firms have been more negatively impacted than less productive domestic firms.
Abstract: We study the evolution and effects of monopsony power in the UK private sector labour market from 1998 to 2017. Using linked employee-firm micro-data, we find that: (1) Measures of monopsony have been relatively stable across the time period examined-rising prior to the crisis, before subsequently falling again.(2) There is substantial cross-sectional variation in monopsony at the industry level.(3) Higher levels of labour market concentration are associated with lower pay amongst workers not covered by a collective bargaining agreement.(4) For workers covered by a collective bargaining agreement, the association between labour market concentration and pay is greatly reduced and in most cases disappears.(5) The link between productivity and wage levels is weaker when labour markets are more concentrated.
'Towards a new monetary theory of exchange rate determination' Bank of England WP 817 (with Ambrogio Cesa-Bianchi, Michael Kumhof and Andrej Sokol )
Abstract: We study exchange rate determination in a 2-country model where domestic banks create each economy’s supply of domestic and foreign currency. The model combines the UIP-based and monetary theories of exchange rate determination, but the latter with a focus on private rather than public money creation. The model features an endogenous monetary spread or excess return in the UIP condition. This spread experiences sizeable changes when shocks affect the relative supplies (of bank loans) or demands (for bank deposits) of the two currencies. Under such shocks, monetary effects dominate traditional UIP effects in the determination of exchange rates and allocations, and this becomes stronger as domestic and foreign currencies become more imperfect substitutes. With these shocks, the model successfully addresses the UIP puzzle, and it is also consistent with the Meese-Rogoff and PPP puzzles.
‘Demographic trends and the real interest rate’ Bank of England Staff Working Paper no. 701, December 2017 (with Noemie Lisack and Rana Sajedi) (Forthcoming in the International Journal of Central Banking) (BU post, Banque de France bulletin (in French))
Abstract: We quantify the impact of past and future global demographic change on real interest rates, house prices and household debt in an overlapping generations model. Falling birth and death rates can explain a large part of the fall in world real interest rates and the rise in house prices and household debt since the 1980s. These trends will persist as the share of the population in the high-wealth 50+ age bracket continues to rise. As the United States ages relatively slowly, its net foreign liability position will grow. The availability of housing and debt as alternative stores of value attenuates these trends. The increasing monopolisation of the economy has ambiguous effects.
‘Monetary Policy Transmission in an Open Economy: New Data and Evidence from the United Kingdom’ Bank of England Staff Working Paper no. 615, September 2016 (with Ambrogio Cesa-Bianchi and Alejandro Vicondoa) (Forthcoming in the European Economic Review)
Abstract: This paper constructs a new series of monetary policy surprises for the United Kingdom and estimates their effects on macroeconomic and financial variables, employing a high-frequency identification procedure. First, using local projections methods, we find that monetary policy has persistent effects on real interest rates and breakeven inflation. Second, employing our series of surprises as an instrument in a SVAR, we show that monetary policy affects economic activity, prices, the exchange rate, exports and imports. Finally, we implement a test of overidentifying restrictions, which exploits the availability of the narrative series of monetary policy shocks computed by Cloyne and Huertgen (2014), and find no evidence that either set of shocks contains any endogenous response to macroeconomic variables.
'Will Brexit Age Well? Cohorts, Seasoning and the Age-Leave Gradient, Past, Present and Future' NBER WP 25219 (with Barry Eichengreen and Rebecca Mari) (Forthcoming in Economica) (VoxEU post) (FT article)
Abstract: In the UK’s 2016 referendum on EU membership, young voters were more likely than their elders to vote Remain. Applying new methods to a half century of data, we show that this pattern reflects both ageing and cohort effects. Although voters become more Eurosceptic as they age, recent cohorts are also more pro-European than their predecessors. Much of the pro-Europeanism of these recent cohorts is accounted for by their greater years of education. Going forward, the ageing of the electorate will thus be offset at least in part by the replacement of older cohorts with younger, better-educated and more pro-European ones. But we also document large nationwide swings in sentiment that have little to do with either seasoning or cohort effects. Hence these demographic trends are unlikely to be the decisive determinants of future changes in European sentiment. Rather, nationwide changes in sentiment, reflecting macroeconomic or other conditions, and the age-turnout gradient will be key.
Pushing on a String: US Monetary Policy is Less Powerful in Recessions, American Economic Journal: Macroeconomics Vol. 8 No. 4, October 2016 (with Silvana Tenreyro) (Vox EU post) (Data Set)
Abstract: We investigate how the response of the US economy to monetary policy shocks depends on the state of the business cycle. The effects of monetary policy are less powerful in recessions, especially for durables expenditure and business investment. The asymmetry relates to how fast the economy is growing, rather than to the level of resource utilization. There is some evidence that fiscal policy has counteracted monetary policy in recessions but reinforced it in booms. We also find evidence that contractionary policy shocks are more powerful than expansionary shocks, but contractionary shocks have not been more common in booms. So this asymmetry cannot explain our main finding.
Why Are Real Interest Rates So Low? The Role of the Relative Price of Investment Goods, IMF Economic Review October 2016 (with Rana Sajedi) (Larry Summers' blog)
Abstract: Across the industrialised world, real interest rates and nominal investment rates have fallen, while house prices and household debt ratios have risen. We present a calibrated OLG model which quantifies how much of these four trends can be explained with a fifth—the widespread fall in the relative price of investment goods. Relative to other explanations for low real interest rates, this trend is important because it can also account for the fall in nominal investment rates. The model can reproduce a small but economically significant part of the observed fall in interest rates and rises in house prices and household debt, and a larger part of the fall in the investment rate. (Working paper version)
‘Step away from the zero lower bound: small open economies in a world of secular stagnation’ Journal of International Economics 2018 (with Giancarlo Corsetti, Eleonora Mavroeidi and Martin Wolf)
Abstract: We study how small open economies can escape from deflation and unemployment in a situation where the world economy is permanently depressed. Building on the framework of Eggertsson et al. (2016), we show that the transition to full employment and at-target inflation requires real and nominal depreciation of the exchange rate. However, because of adverse income and valuation effects from real depreciation, the escape has a beggar-thy-self effect, that may end up lowering welfare while eliminating underemployment. We show that as long as the economy remains financially open, domestic asset supply policies or reducing the effective lower bound on policy rates may be ineffective or even counterproductive. However, closing domestic capital markets does not necessarily enhance the monetary authorities' ability to rescue the economy from stagnation. (Previously published as Bank of England Staff Working Paper no. 666, July 2017)
‘Foreign booms, domestic busts: the global dimension of banking crises’, Journal of Financial Intermediation (2019) (with Ambrogio Cesa-Bianchi and Fernando Eguren Martin) (BU post)
Abstract: This paper provides novel empirical evidence showing that foreign financial developments are a powerful predictor of domestic banking crises. Using a new data set for 38 advanced and emerging economies over 1970–2011, we show that credit growth in the rest of the world has a large positive effect on the probability of banking crises taking place at home, even when controlling for domestic credit growth. Our results suggest that this effect is larger for financially open economies, and is consistent with transmission via cross-border capital flows and market sentiment. Direct contagion from foreign crises plays an important role, but does not account for the whole effect. (earlier version available as Bank of England Staff Working Paper no. 644, January 2017)
‘The banks that said no: banking relationships, credit supply and productivity in the United Kingdom’ Journal of Financial Services Research (2019) (with Jeremy Franklin and May Rostom), (BU post)
Abstract: This paper uses a large firm-level data set of UK companies and information on their pre-crisis lending relationships to identify the causal links from changes in credit supply to the real economy following the 2008 financial crisis. Controlling for demand in the product market, we find that the contraction in credit supply reduced labour productivity, wages and the capital intensity of production at the firm level. Firms experiencing adverse credit shocks were also more likely to fail, other things equal. We find that these effects are robust, statistically significant and economically large, but only when instruments based on pre-crisis banking relationships are used. We show that banking relationships were conditionally randomly assigned and were strong predictors of credit supply, such that any bias in our estimates is likely to be small. (Earlier version available as Bank of England staff paper no. 557, October 2015)
'Brexit and Uncertainty: Insights from the Decision Maker Panel' Fiscal Studies Vol. 39, Issue 4, p555-580 (with Nick Bloom, Phil Bunn, Scarlet Chen, Paul Mizen, Pawel Smietanka and Garry Young) (Bank of England Staff Working Paper 780) (Economist article) (Harvard Business Review article)
Abstract: The UK's decision to leave the EU in the 2016 referendum created substantial uncertainty for UK businesses. The nature of this uncertainty is different from that of a typical uncertainty shock because of its length, breadth and political complexity. Consequently, a new firm‐level survey, the Decision Maker Panel (DMP), was created to investigate this, finding three key results. First, Brexit was reported to be one of the top three sources of uncertainty for around 40 per cent of UK businesses in the two years after the vote in the June 2016 referendum, and this proportion increased further in Autumn 2018. Hence, Brexit provided both a major and persistent uncertainty shock. Second, uncertainty has been higher in industries that are more dependent on trade with the EU and on EU migrant labour. Third, the uncertainties around Brexit are primarily about the impact on businesses over the longer term rather than shorter term, including uncertainty about the timing of any transition arrangements and around the nature of Brexit.
Work in Progress
‘The public channel of monetary policy’ with Andrea Alati and Silvana Tenreyro
‘Old dogs and new tricks: workforce aging and the global slowdown in TFP’ with Gee Hee Hong
Work for the Resolution Foundation
'The Effect of Automatic Stabilisers on UK Business Cycles' (with Marco Graziano and James Smith)
Other Bank Underground
Older working papers and published policy work
‘Efficient frameworks for sovereign borrowing’ (2008), (with Gregor Irwin), Bank of England working paper no. 343
‘Optimal emerging-market fiscal policy when trend output growth is unobserved’ (2006), Bank of England working paper no. 308
‘Fiscal rules for debt sustainability in emerging markets – the impact of volatility and default risk’ (2006), (with Adrian Penalver), Bank of England working paper no. 307
‘Real world mortgages, consumption volatility and the low inflation environment’ (2005), (with Sebastian Barnes), Bank of England working paper no. 273
‘The Measurement of House Prices’ (2003) (with Rob Wood) Bank of England QB, Spring 2003
M.A. Economics, 2000, King’s College, Cambridge
M.Sc Economics, 2001, University College London
PhD Economics, 2015, London School of Economics