Why do countries trade?

This blog is part of our ‘Beginner’s Guide’ series; insightful, accessible explainers of all things trade. The author of this instalment is Pinar Gunes, an Assistant Professor in Trade and CITP researcher at the University of Sussex. In this piece, Pinar delves into how trade shapes economic growth and explains why understanding trade matters more than ever. If you wish to deepen your knowledge on trade policy, check out the CITP's Online Diploma in International Trade Policy.  International trade is often reduced to headlines about tariffs, deficits, and trade wars. It is frequently discussed as a political choice—something governments decide to allow or restrict. Yet beneath this political noise lies a fundamental force that has shaped the world for centuries—the desire to exchange goods and services with others for mutual benefit. Long before money, modern borders, or governments existed, people exchanged goods through barter: trading what they had for what they needed. Because no individual or community could produce everything on their own, exchange became a practical way to survive and prosper. Today, this exchange takes place across national borders on an unprecedented scale, creating a deeply interconnected global economy. Countries trade because they are different The most straightforward reason [...]

By |2026-04-08T08:58:24+01:008 April 2026|Begginer's Guides, Blog|0 Comments

All roads lead to Geneva: Insights from MC14

From 26 March to the early hours of 30 March 2026, ministers from WTO Members met in Yaoundé, Cameroon, for the 14th WTO Ministerial Conference. The goal was to review the past two years of negotiations and deliver outcomes on the MC14 agenda. Coined the Reform Ministerial, most discussions focused on the WTO's future amidst existing challenges and opportunities. And because it was held in an African country, the MC14 strongly emphasised development-related issues. However, the current geopolitical context affected expectations for MC14, resulting in broad and vague ministerial documents and declarations. WTO negotiations depend on what WTO Members can agree on by consensus. Conflicting interests and diverging interpretations of even cornerstone rules, such as the most-favoured-nation (MFN) principle, made significant progress difficult. MC 14 outcomes MC14 outcomes were reached in advance and only formalised in Yaoundé. WTO Members agreed to continue negotiating fisheries subsidies, with a goal to achieve a comprehensive Agreement on Fisheries Subsidies (AFS2) during MC15. Since AFS1 entered into force on 15 September 2025, Members have until September 2029 to adopt AFS2. Failure to do so will result in the current agreement being terminated (unless the General Council decides otherwise). Ministers also adopted two decisions on [...]

By |2026-03-31T14:30:54+01:0031 March 2026|Blog, International Trade|1 Comment

Critical Minerals as an Observatory for Evolving Forms of Trade Cooperation

Critical minerals have captured the world’s attention as constituting a modern issue straddling matters of security, sovereignty, industry, and sustainability. Characterized by concentration in production and supply chains, they are imperative for energy transition industries and manufacturing of technology and defence equipment. For resource-hungry economies such as the United States, the European Union, Japan, South Korea, and the United Kingdom, securing resilient and sustainable critical minerals supply chains is key to resolving anxieties about perceived Chinese weaponization of supply chains, and ensuring their economic security and national security. For resource-rich developing countries across Asia, Africa, and South America (e.g. Chile), the priority lies in not only securing fair prices, but also leveraging mineral endowments to support domestic industrialization, economic diversification, and escape primary commodity dependence. In result, we see the re-emergence of an age-old tension that has shaped both the foundations and evolution of global trade. Trade rules conceptualized during the interwar period and institutionalized in the General Agreement on Tariffs and Trade (GATT) were grounded in securing access to raw materials and markets. The references to the “resources of the world” (Preamble, First Recital) and “equitable share of the international supply of products” (Article XX(j)), and rules prohibiting the use of quantitative restrictions (Article XI), also reflect this commitment to the free exchange [...]

By |2026-03-25T15:59:28+00:0025 March 2026|Blog, International Trade|0 Comments

The UK-EU Trade and Cooperation Agreement (TCA) one year on: trade in goods

11 February 2022 Nicolo Tamberi is Research Officer in Economics at the University of Sussex and Fellow of UKTPO. With trade data for the full year 2021 just released, we update our earlier estimates of the UK-EU Trade and Cooperation Agreement’s impact on bilateral trade between the UK and the EU for the first year of the agreement. […]

By |2025-07-18T09:48:44+01:0011 February 2022|UK- EU|0 Comments

UK-EU trade and the TCA update: results up to April 2021

23 July 2021 Nicolo Tamberi is Research Officer in Economics at the University of Sussex and a fellow of the UKTPO. We have updated our estimates of the effects of the introduction of the Trade and Cooperation Agreement (TCA) on UK-EU trade in 2021 through to April. The methodology used was described in the UKTPO briefing paper 57 (see the appendix for details). We find that over the period January-April 2021, the TCA reduced UK exports to the EU by 18.7% and imports from the EU by 25.8% compared to the scenario in which the UK did not leave the EU. […]

By |2025-07-18T09:59:29+01:0023 July 2021|UK- EU|2 Comments

Two months in: the impact of Brexit on UK trade

20 April 2021. Michael Gasiorek is Professor of Economics and Director of the UKTPO. Yohannes Ayele is Research Fellow in the Economics of Brexit at the University of Sussex and Fellow of the UKTPO. A decline in trade with the EU was expected following the coming into force of the Trade and Cooperation Agreement between the UK and the EU on the 1st of January. Nevertheless, when the UK January trade figures were released in early March, almost unanimously commentators were surprised by the extent of the decline. We now have the data for February and so in this blog we update the numbers and discuss their significance. […]

By , |2025-07-18T10:05:10+01:0020 April 2021|UK - Non EU, UK- EU|17 Comments

A Fine Kettle of Fish

23 March 2021 Michael Gasiorek is Professor of Economics and Director of the UK Trade Policy Observatory at the University of Sussex. Suzannah Walmsley is Principal Consultant and Fisheries and Aquaculture Business Development Manager at ABPmer. Last week the UK’s trade data for January 2021 came out and the evidence was pretty striking. It showed a dramatic decline in UK exports and imports in January, and particularly so with the EU. Now some of this will have been driven by Covid-related lockdown restrictions, and some of the dramatic fall in trade with the EU itself may have been driven by firms’ stockpiling in November and December to protect themselves against the much-publicised potential border difficulties arising from the UK’s exit from the EU and the end of the transition period. In this blog we dig a bit deeper into those numbers and focus just on fisheries. […]

By , |2025-07-18T10:09:17+01:0023 March 2021|UK - Non EU, UK- EU|1 Comment

A Trade Bargain to Secure Supplies of Medical Goods

12 June 2020 Simon Evenett is Professor of International Trade and Economic Development at the University of St. Gallen, and coordinator of the Global Trade Alert. He is an Associate Fellow of the UKTPO. L. Alan Winters CB is Professor of Economics and Director of the UKTPO. The COVID-19 pandemic has disrupted trade policy, along with everything else.  As nations scrambled this year to source medical supplies – equipment, drugs and personal protective equipment – 89 governments imposed 154 restrictions on exports. What is much less well known is that 154 reforms easing imports of these goods were implemented by 104 nations too. It took a pandemic for some policymakers to grasp that taxing imported soap makes no sense. As well as up-ending trade in the medical goods, these policy shifts have the unintended consequence of providing the foundation for a new trade bargain between nations over medical supplies. As a sizeable and reliable exporter of these goods this matters for the UK and comes at the time when British ministers and officials want to showcase an independent trade policy. It is at times like these—when the big beasts of the world trading system are at loggerheads—that, traditionally, the free [...]

By , |2025-07-18T10:34:05+01:0012 June 2020|UK - Non EU, UK- EU|0 Comments

A global agreement to end disruption of Coronavirus medical supplies

1 May 2020 An international agreement on vital medical goods that keeps import restrictions low and constrains the use of export bans could help ensure all countries have sufficient supplies for the fight against Coronavirus, our new briefing paper proposes. According to the report, which was produced in collaboration with Global Trade Alert, a global bargain where exporting nations give assurances medical supplies will not be cut off arbitrarily and importing governments agree not to re-introduce their import restrictions would remove disruption and uncertainty around the availability of life-saving goods. […]

By |2020-05-01T10:52:58+01:001 May 2020|UK - Non EU, UK- EU|0 Comments

The UK’s ‘No Deal’ Tariffs: An Update

16 October 2019 Julia Magntorn Garrett is a Research Officer in Economics at the University of Sussex and Fellow of the UK Trade Policy Observatory.  In March 2019, Theresa May’s Government published a set of ‘No deal’ tariffs, designed to apply for up to 12 months in the event that the UK left the EU without a deal. The UKTPO described them in a blog and a Briefing Paper. On October 8, the new Government published an updated ‘No deal’ tariff schedule. This blog outlines the main changes, and recalculates various statistics, on the basis of the new tariff proposal. […]

By |2025-07-18T11:06:08+01:0016 October 2019|UK - Non EU, UK- EU|0 Comments
Go to Top