The African Continental Free Trade Area agreement will create the largest single market in the world in terms of the number of countries and people. We analyse the effects of regional trade liberalisation on production fragmentation and networks using a global computable general equilibrium model adapted to take into account the value-added structure of international trade. This permits the analysis of the impact of trade policies in the presence of global upstream and downstream linkages through a counterfactual analysis. The analysis goes beyond previous studies by focusing on member countries’ agricultural and food integration in regional and global value chains through backward and forward linkages. Our simulation results suggest that the agreement could have a significant impact on trade patterns in terms of value-added structure and extra- or intra-regional destinations. The reduction in trade costs within the region has a higher incidence on agriculture and food backward intra-regional integration than on forward participation, but this pattern varies substantially across countries. We find that the continental agreement translates in more widely spread benefits across sectors if we consider the income generated within each sector (value added) rather than simply accounting for gross exports.

Global Value Chains (GVCs) have transformed production across a broad range of goods and services worldwide. New trade statistics are required in order to perform a more accurate analysis of trade flows through their decomposition in terms of value-added content, distinguished according to the sector/region of origin/destination. Our approach traces value added embedded in trade flows back to its origin or forward to its destination in a Computable General Equilibrium (CGE) model. A new module (available as a download with this paper) is introduced to the Global Trade Analysis Project (GTAP) model and used in a stylized scenario with 3 regions (the United States, the European Union and the Rest of the World) and 3 sectors (Manufactures, Agrifood and Services) where a free trade area between the European Union and the United States is simulated. Results show that the new version of the model (GTAP-VA) makes a useful contribution to trade policy analysis.

We analyse the likely trade effects of the Trade and Cooperation Agreement (TCA), which defines the post-Brexit trading environment between the United Kingdom (UK) and the European Union (EU). We apply a computable general equilibrium model and focus on trade in value added rather than just the gross values of exports and imports. We describe the TCA and estimate its effects on the costs of conducting UK–EU trade, including various non-tariff barriers in both goods and services. We suggest that the TCA will reduce UK trade significantly: total exports by around 7 per cent and imports by around 14 per cent. In terms of value added (i.e. incomes generated), textiles and vehicles, both of which trade extensively with the EU, suffer heavily, as do services which trade significantly with the EU, face large increases in trade barriers, and experience declining demand from other sectors as those sectors’ exports fall. Such inter-industry linkages spread the losses from Brexit widely through the economy.

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Since production and trade are increasingly organized within global value chains (GVCs), assessing who effectively pays the cost of protection is not straightforward and since productive processes are internationally fragmented, quantifying the effects of trade policy requires an enhanced analytical framework that takes international input–output linkages into account to assess the implications trade costs have on competitiveness at national and sector levels. This paper defines a new synthetic measure of trade protection based on the value added in trade, capturing the effects that the tariff structure has on exporting firms that rely on imported intermediate inputs. The index, defined in a general equilibrium framework, provides a theoretically sound protection measurement in the context of GVCs. We assess trade protection by computing protection indexes at the bilateral level on both gross imports and imports to exports using the Global Trade Analysis Project computable general equilibrium model. These indexes are used to investigate the relationship between the European Union tariffs and integration of the Italian GVCs. In the case of Italy, imports to exports are overall less protected than gross imports with significant differences at the sector level. Despite the low levels of nominal protection, industrial sectors play a central role in explaining our results. EU tariffs mostly affect Italian exporting firms in the case of chemical products, wearing apparel and leather products.