Eurozone Currency Union: Economic Implications and Structure

Mundell's Theory on Currency Sharing

Mundell explained that similar countries can share a single currency. This prevents them from devaluing their money or changing interest rates, so they must solve economic problems by reducing wages and prices.

Requirements for a Currency Union

A currency union requires:

• Labour mobility, which is low in the eurozone due to language and culture.
• A diversified economy, which the eurozone possesses.
• Openness and flexibility, allowing capital, prices, and wages to adjust freely.
• A common fiscal system, which the EU has only partly, as there is no central tax system.

The Euro's Implementation Timeline

The Maastricht Treaty set the euro’s timetable:

Key Dates

1. Fixed exchange rates in May 1998.
2. The euro’s electronic start in 1999.
3. Notes and coins introduced in 2002.
4. End of national currencies in February 2002.

Before the euro, buying in another EU country required many currency changes and high costs, reducing efficiency and discouraging cross-border trade.

Current Status of the Euro

Today, 340 million people in 20 countries use the euro, with 16.6 billion banknotes and 103 billion coins in circulation.

Impact of Joining Exchange Rates

The joining exchange rate is crucial. An overvalued currency (Croatia, Italy, Greece) makes products too expensive, causing trade deficits, unemployment, falling wages, and emigration, as domestic industries lose competitiveness. An undervalued one (Ireland) boosts competitiveness, investment, and population but may create excess demand, high prices, and housing pressure.

Ireland's Experience with the Euro

Ireland benefits through the removal of exchange costs and exchange-rate risk, lower and more stable interest rates, higher demand, trade, competitiveness, and investment. The euro also protects against external shocks and favours Ireland as an English-speaking eurozone country. Before the euro, exchanging IR£100 into all EU currencies left only IR£48; this problem disappeared with the single currency.

Costs of Euro Membership

Costs include losing independent monetary policy, limited fiscal control, and dependence on larger eurozone economies. Countries cannot devalue to gain competitiveness. Changes in the British pound affect Irish exports, inflation may appear, banks lose exchange-related income, and the transition itself had administrative and technological costs.