EFB336 Chap.7 Regional Agreements and Brexit
Regional Agreements and Brexit
Regional integration lowers barriers among selected partners while preserving a boundary with outsiders. Its welfare effect is ambiguous because lower-cost partner imports can replace costly domestic production, but preferences can also displace still cheaper imports from non-members. Deeper arrangements coordinate more than tariffs and therefore constrain policy autonomy more strongly.
Brexit provides a case for separating formal market access, customs frictions, regulatory alignment and the geography of supply chains.
What this chapter covers
- 01
Preferential trade areas and customs unions
- 02
Trade creation from lower-cost partner supply
- 03
Trade diversion away from efficient outsiders
- 04
Rules of origin and border administration
- 05
Depth of integration and policy autonomy
- 06
Brexit, regulatory frictions and supply chains
Worked example · free
Distinguish trade creation from diversion
- +1Domestic production at $13 is replaced by partner imports at $10, which is initially a trade-creation effect.
- +1The outside supplier’s resource cost is lower at $9, but the remaining tariff makes its delivered price $12.
- +1The preference therefore also diverts sourcing away from the most efficient outside producer.
- +1Net welfare depends on the saved domestic resource cost and the tariff revenue lost when imports switch.
Key terms
- Customs union
- An agreement combining internal free trade with a common external trade policy.
- Rules of origin
- Criteria used to determine whether a product qualifies for preferential treatment under an agreement.
- Regulatory alignment
- The degree to which jurisdictions maintain comparable product or production rules to reduce compliance frictions.
Regional Agreements and Brexit FAQ
Why can a trade agreement reduce welfare?
Preferences may cause buyers to replace a lower-cost outside supplier with a higher-cost partner whose tariff advantage makes its delivered price cheaper. The government also loses tariff revenue on the displaced outside imports. These trade-diversion costs can outweigh production savings.
What changes as integration becomes deeper?
A shallow agreement mainly lowers selected border barriers. Deeper integration may coordinate external tariffs, regulations, factor mobility or monetary policy. Greater depth can reduce more frictions, but it requires more shared rules and therefore places stronger limits on independent policy choices.
How should Brexit be used in an economics answer?
Treat it as evidence for mechanisms rather than as a chronology exercise. Identify the new customs, regulatory or mobility friction, predict which sectors are exposed through supply chains, and distinguish a one-time adjustment from a lasting cost. Then consider any regained policy flexibility as a possible offset.
Exam move
Use two linked tools: an integration ladder and a sourcing ledger. On the ladder, begin with a preferential trade arrangement, then add the features required for a free-trade area, customs union and deeper market integration. Record the institutional consequence of each step. If members keep different external tariffs, origin rules are needed to prevent trade from entering through the lowest-tariff member.
A common external policy reduces that problem but requires members to surrender an independent tariff choice. Regulatory alignment and factor mobility can remove deeper frictions while increasing the importance of joint rules. On the sourcing ledger, write four numbers before evaluating a preference: domestic production cost, partner resource cost, outside resource cost and the tariff applying to outsiders.
Trade creation occurs when partner imports displace higher-cost domestic output. Trade diversion occurs when the preference displaces an outside source with a lower underlying resource cost. Add the government revenue that disappears when sourcing moves away from a taxed outsider. Do not classify the outcome from delivered prices alone because policy creates part of that price difference.
For Brexit questions, organise evidence by mechanism instead of chronology. Customs declarations add administrative cost, border delay increases inventory and spoilage risk, regulatory divergence may require duplicate testing, restrictions on movement affect labour-intensive services, and reduced policy alignment can create autonomy for a different domestic rule.
Supply chains that cross a border several times compound even modest costs. Practise one paragraph that distinguishes a level effect from adjustment: the expense of changing suppliers may be temporary, while recurring declarations or incompatible standards can persist. Add sector heterogeneity because local services, digital trade and time-sensitive manufacturing face different exposure.
Conclude conditionally by balancing reduced integration costs or regained policy flexibility against trade creation, diversion, investment and administrative burdens. This produces an economics answer grounded in prices, quantities and institutional depth rather than a political slogan.
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