Working Papers

The Mutable Geography of Firms' International Trade: Evidence and Macroeconomic Implications [Slides][Online Appendix I: UK Results] [Online Appendix II: Additional China Results]

Exporters add and drop destination markets in response to a variety of global, national and industry-specific shocks. This paper develops empirical measures of these market changes and documents a set of key stylized facts using the customs databases of China (2000-2006) and the United Kingdom (2010-2016). First, I find within-firm changes in destination markets involve large trade values and 30-40% of all market changes involve simultaneously adding and dropping markets. Second, around 20% of within-firm market changes are driven by fluctuations in bilateral exchange rates and local CPI measures. Taken together, these facts suggest that firms face large destination-specific fluctuations in the demand for their products. Third, while adding and dropping markets, firms simultaneously adjust prices and quantities across all other destinations they serve. I build a multi-country general equilibrium model to investigate the channels that can generate the observed data patterns and study the aggregate implications of mutable markets (within-firm market changes) on the distribution of markups, trade volumes, and welfare. Applying the multi-country model to analysis of a bilateral trade war, I find that aggregate productivity for countries directly involved in the trade war drops more (1-2%) and that of countries not involved rises more (8-10%) when firms endogenously vary their markets in response to the new conditions of competition in local markets induced by the bilateral trade war.

Winner of the RoWE Young Economists Prize at the 21st European Trade Study Group (ETSG) Annual Conference

Markets and Markups: A New Empirical Framework and Evidence on Exporters from China with Giancarlo Corsetti, Meredith Crowley, and Huasheng Song

Firms that dominate global trade export to multiple countries and frequently change their foreign destinations. We develop an estimator of the destination-specific markup elasticity to the exchange rate that controls for endogenous market selection. To proxy for firms' power in local markets, we introduce a new classification of products based on Chinese linguistics that distinguishes between highly and less differentiated goods. Using Chinese customs data, we show that controlling for selectivity unveils significant pricing-to-market for highly differentiated goods. Measured in the importer's currency, the prices of highly differentiated goods are more stable than those of less differentiated products.

Winner of the Emerald Best Paper Award at the 2018 China Finance Review International Conference

Invoicing and Pricing-to-Market: A Study of Price and Markup Elasticities of UK Exporters with Giancarlo Corsetti and Meredith Crowley [Slides] [VoxEU]

In this paper, we provide novel micro evidence that the currency in which exports and imports are invoiced is a good proxy for the currency in which firms set prices. Using detailed data on UK customs transactions, we document that destination-specific markup adjustment is substantial only for export shipments which are invoiced in the destination market's currency, consistent with the view that firms invoicing in local currency price to market. Conversely, we find no destination-specific markup adjustments by firms that invoice a shipment in either their own currency or a vehicle currency, consistent with a firm setting one price either in their own or in a vehicle currency. However, we also document that, while the aggregate shares of invoicing currencies for the UK's exports and imports are stable over time, there is substantial heterogeneity at the firm-product-destination level. A firm's shipments of the same product to the same destination are often invoiced in multiple currencies, with a non-trivial degree of switching from one invoicing currency to another within a twelve-month period. This is more pronounced for firms that are multi-product and serve several destinations, pointing to a potentially important margin of adjustment so far understudied in the literature.

Renegotiation of Trade Agreements and Firm Exporting Decisions: Evidence from the Impact of Brexit on UK Exports with Meredith Crowley and Oliver Exton

The renegotiation of a trade agreement introduces uncertainty into the economic environment. We exploit the natural experiment of the Brexit referendum to estimate the impact of uncertainty associated with trade agreement renegotiation. Empirically, we develop measures of the trade policy uncertainty facing firms exporting from the UK to the EU after June 2016. Using the universe of UK export transactions at the firm and product level, we estimate entry (exit) in 2016 would have been 5.0% higher (6.1% lower) if firms exporting from the UK to the EU had not faced increased trade policy uncertainty after June 2016.

Media Coverage: VoxEU; The Economist (2018, 2019); The Financial Times; The Telegraph

Work in Progress

Firm Level Pass Through: A Machine Learning Approach

Understanding how exporters react to exchange rate shocks is important for evaluating international shock transmissions and setting the optimal international monetary policy. Empirical studies have documented huge heterogeneity in the degree to which different firms and products respond to exchange rate shocks. In addition, estimates of exchange rate pass through (ERPT) are time varying and depend on observed and unobserved variables in a nonlinear way. This paper proposes a machine learning algorithm that systematically detects determinants of ERPT and estimates ERPT at the firm-level in a large-scale custom dataset. The accuracy of the algorithm is tested on simulated data from an extended multi-country version of Atkeson and Burstein (2008). Applying the algorithm to China’s custom data from 2000-2006, this paper estimates the ERPT of China’s exporters and documents new evidences on the nonlinear relationships among market structures, unit value volatility and ERPT.

Retail Dynamics and Trade Elasticity Puzzle


The Sterling Depreciation and UK Price Competitiveness, 26 August 2019, VoxEU, with Giancarlo Corsetti and Meredith Crowley

The Impact of Brexit Uncertainty on UK Exports, 21 January 2019, VoxEU, with Meredith Crowley and Oliver Exton

A Granular Analysis of the Exposure of UK Exports to EU Tariffs, Quotas and Antidumping under ‘No Deal’, 13 December 2017, VoxEU, with Giancarlo Corsetti, Meredith Crowley and Oliver Exton