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The three cases below are public reading examples: England’s plastic bag charge, the ECB’s June 2024 rate cut and the UK–Australia trade agreement. Each separates the reported facts, an economic mechanism and a limitation of the evidence.
England introduced a 5p charge at large retailers in October 2015 and extended a 10p minimum to all businesses in May 2021. Defra reports that the main retailers sold 164 million single-use bags in 2024–25, almost 98% fewer than in 2014.
Economic mechanism: Charging for a previously free bag changes the incentive at checkout. Reusing a bag becomes more attractive, illustrating how a price signal can reduce consumption associated with environmental costs.
Evaluation: These figures measure single-use bags from the main retailers, not all plastic consumption. Substitution towards other bags and changes in retailer behaviour matter; the before-and-after comparison alone does not isolate the effect of the charge.
On 6 June 2024, the European Central Bank announced a 0.25 percentage point cut in its three key interest rates. The deposit facility rate became 3.75% on 12 June 2024.
Economic mechanism: If lower policy rates feed through to borrowing costs, households and firms may increase consumption and investment. This can support aggregate demand, with effects on output and inflation depending on spare capacity.
Evaluation: A rate cut does not mean that policy is loose: the ECB still described financing conditions as restrictive. Transmission takes time and depends on lending conditions, confidence and existing fixed-rate loans.
European Central Bank: monetary policy decisions, 6 June 2024
The UK–Australia free trade agreement entered into force on 31 May 2023. It removed Australian tariffs on qualifying UK goods exports, while liberalisation for some sensitive agricultural imports into the UK was phased over time.
Economic mechanism: Removing a tariff can reduce the cost of an imported product, benefiting consumers and firms that use imported inputs. Exporters gain market access, while competing domestic producers face stronger competition.
Evaluation: Benefits depend on firms using the preferences and on how much lower costs reach buyers. Consider trade creation versus trade diversion, adjustment costs and the timing of tariff changes; announced projections are not observed outcomes.
UK Department for Business and Trade: agreement launch, 31 May 2023
