Study Notes on Exchange Rates and Economic Policies

Overview of Final Exam Preparation

  • Date and Time: Final exam scheduled for Monday, same duration as class time.

  • Format: Similar to in-class assessments.

  • Practice Problems: Should already be available; confirmation planned for post-class.

  • Topics for Final: Four main topics covered since second exam:

    • Business Cycle

    • Fiscal Policy

    • Monetary Policy

    • Open Economy (latest topic covered)

Content Structure for Today's Class

  • Focus on exchange rates.

  • Discussion on how an open economy and exchange rates impact government behavior, consumption, and investment through interest rates.

  • Goal: Move economy closer to potential output.

Key Topics on Exchange Rates

  • Exchange Rate Types:

    • Nominal Exchange Rate

    • Fixed vs. Flexible Exchange Rates

    • Real Exchange Rates

  • Law of One Price: Holds in the long run.

Understanding Exchange Rates

  • Nominal Exchange Rate: Reflects the value of one currency against another.

    • Example: Price of foreign currency in terms of US dollars, or vice versa.

    • Illustrated through a graph showing US nominal exchange rate against a basket of currencies (euro, yen, etc.).

  • Real Exchange Rate: Reflects purchasing power and indicates the price of domestic goods relative to foreign goods.

    • Formula: extRealExchangeRate=racextNominalExchangeRateimesextDomesticPriceextForeignPriceext{Real Exchange Rate} = rac{ ext{Nominal Exchange Rate} imes ext{Domestic Price}}{ ext{Foreign Price}}

    • Implications of high vs. low real exchange rates on competitiveness in international markets.

Currency Fluctuations

  • Appreciation: Increase in currency value.

    • Example: From 0.5 pounds to 0.6 pounds per dollar.

  • Depreciation: Decrease in currency value.

    • Example: From 96 yen to 95 yen per Canadian dollar.

Impacts of Exchange Rates on Import/Export

  • Currency value affects a country's export capabilities. A weaker currency leads to cheaper exported goods, enhancing competitiveness abroad.

  • Net Exports: Calculation is export minus import. High real exchange rates generally lead to a decrease in net exports and vice versa.

The Relationship Between Exchange Rates and Monetary Policy

  • Changes in interest rates lead to changes in exchange rates and impact net exports.

  • Higher interest rates increase demand for dollars, leading to a higher exchange rate, thereby decreasing net exports.

Theoretical Frameworks

  • Purchasing Power Parity (PPP): Suggests that the exchange rate adjusts so that similar baskets of goods cost the same in different countries.

  • Practical application illustrated through the Big Mac Index: A humorous take on comparing costs across countries, showing over- or undervalued currencies based on local Big Mac prices.

Speculative Attacks on Fixed Exchange Rates

  • Fixed rates can lead to imbalances, and speculative attacks may occur when investors believe a devaluation is likely, prompting them to sell off domestic currency.

  • Example: George Soros's bet against the British pound in 1992 illustrates the dynamics of currency speculation.

Concluding Notes on Monetary Policy

  • Fixed vs. Flexible Exchange Rates:

    • Flexible: Determined by market forces.

    • Fixed: Government sets value, leading to limitations on monetary policy effectiveness.

  • The implications of choosing an exchange rate regime for international trade and economic stability are significant.

Final Reminders

  • Review Practice Problems: Encouraged to prepare thoroughly before the exam.

  • Reminder of Topics: Ensure understanding of the four main sections covered for the final assessment.

  • Office Hours and Communication: Availability to clarify doubts or further assist with exam prep.