## 1984.  The later stages of the dollar appreciation at the

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### Dollar appreciation and subsequent movements (1984–1987)
- 1984–1985 observations:
  - The later stages of the dollar appreciation at the end of 1984 and the beginning of 1985 are described as "more difficult to explain in terms of fundamentals."
  - These stages "coincided with both a surging U.S. current account deficit and movements in interest differentials unfavorable to dollar-denominated assets."
  - The text states that "bandwagon effects or a speculative bubble played a role in this spike of the dollar."
- Fall after the Plaza Agreement:
  - The subsequent fall of the dollar "more closely exhibits the expected relationship with the cycle, with a positive association between the exchange rate and real interest rates, especially the long-term interest differential," starting in the months immediately before the Plaza Agreement of September 1985.
  - The rapid decline in the dollar over the year following the Plaza Agreement is characterized as both "a correction of the previous overshooting" and "a reflection of the fall in U.S. long-term interest rates as inflationary expectations adjusted downward and monetary policy eased."
- Reversal after the Louvre Accord:
  - The relationship between the dollar and interest differentials "was reversed, however, following the Louvre Accord of February 1987, which sought to foster stability of exchange rates around the prevailing levels."
  - The Accord led to "an increased perception of inflationary risks."

### Concepts and measurement notes drawn from the passage
- Risk premium:
  - "The risk premium on the domestic currency measures the amount that the domestic interest rate must exceed the foreign interest rate—after adjusting for the expected change in the exchange rate—to equilibrate asset markets."
  - For given levels of interest rates and the expected future exchange rate, "a decline in the risk premium on the domestic currency implies an appreciation of the currency."
- Relative measures:
  - "Interest differentials and relative output gaps are measured relative to a weighted average of the real interest rates and output gaps of the six other major industrial countries, the weights being based on the trade weights used in the calculation of the effective exchange rate indices."
  - Caveat: "Especially for interest rates, however, it must be noted that weights of countries in financial markets may be quite different from their trade weights."
- Real effective exchange rate:
  - "The real effective exchange rate is based on consumer prices and is measured relative to 20 industrial countries."

### Views on equilibrium exchange rate calculations (Box 5 summary)
- Three broad perspectives:
  - Exchange rates always reflect fundamentals if markets clear and thus are not substantially out of equilibrium.
  - Exchange rates can be misaligned with fundamentals, but skepticism exists about adequacy of any particular model or set of models.
  - Market rates can become badly misaligned at times; a quantitative framework is needed to identify misalignments early—while recognizing estimates are inherently imprecise and markets warrant deference.
- Estimates of equilibrium exchange rates are inherently imprecise; deviations need careful interpretation and do not automatically call for policy action.

### Approaches to calculating equilibrium exchange rates
- PPP / international competitiveness measures:
  - Use price or cost indices (consumer price indices, GDP deflators, export prices, unit labor costs).
  - Based on the law of one price for tradable goods; strong evidence rejects the law of one price for short-run behavior.
  - PPP is reconsidered as a long-run hypothesis and framework for medium- to long-run equilibrium exchange rates.
- Macroeconomic balance framework:
  - Originated in IMF work at least as early as summer of 1967.
  - Derives equilibrium exchange rates from estimates of external current account balances consistent with internal balance (full employment without rising inflation).
- Single-equation reduced-form models:
  - Exchange rates as dependent variables, drawing on modified PPP and macroeconomic balance frameworks.
  - Typically derived from net foreign asset accumulation models incorporating trends in productivity, terms-of-trade variables, fiscal balances, and other fundamentals.

### Macroeconomic balance approach used at the IMF — procedural steps
- Step 1: Apply a trade-equation model to estimate underlying current account positions at prevailing market exchange rates if countries produce at potential output.
- Step 2: Use a separate model to estimate “equilibrium” or “normal” saving-investment positions based on medium-run determinants, assuming production at potential output.
- Step 3: Calculate, in a multilateral framework, the exchange rate changes required, other things equal, to equilibrate underlying current accounts with equilibrium saving-investment positions simultaneously.
- Step 4: Make judgmental assessments on whether calculated adjustments indicate badly misaligned currencies.
- Key caveats and features:
  - Primary motivation is to identify cases of badly misaligned exchange rates, not to prescribe targets.
  - Focuses on medium-run equilibrium by assuming countries at potential output.
  - Provides multilateral, globally consistent assessment of external positions.
  - Emphasizes real multilateral (not nominal bilateral) exchange rates.
  - Results are inputs requiring judgmental interpretation, considering cyclical positions, structural changes, and market expectations.
  - Applications have been largely confined to industrial countries due to data limitations and assumptions of high capital mobility.

### Interpreting deviations from medium-run equilibrium
- Substantial deviations do not automatically mean “markets are wrong”:
  - Deviations can reflect different phases of business cycles where markets expect gradual adjustments toward medium-run equilibria—these expectations are normally reflected in interest differentials and forward rates.
  - Deviations may indicate “policies are wrong,” e.g., when large interest differentials reflect market concerns about large fiscal imbalances.
  - Deviations against a background of sound policies and narrow interest differentials may suggest true misalignment.
- No general prescription for action when large deviations are observed; decisions must be case-by-case within a broader macroeconomic assessment, conditioned by policy consistency with ultimate targets and the extent of exchange rate deviation.

### Relationship between business cycles and exchange rates — findings
- Empirical evidence:
  - Casual inspection and econometric research provide mixed evidence on systematic relationships between exchange rates, interest differentials, and cyclical variables; short-term exchange rate changes largely appear random.
  - Stronger relationships emerge when focusing on lower-frequency components with horizons of 1!/2 to 8 years (frequencies corresponding to typical business cycles).
  - Simultaneity complicates estimation: policy reactions and exchange-rate effects on aggregate demand cause two-way causation.
- Examples:
  - U.S. dollar declines in 1987 despite higher interest rates as monetary policy responded.
  - Deutsche mark appreciation around 1986 and from 1991 linked partly to German reunification and fiscal/external deficits to finance eastern Länder investment.
  - Yen appreciation starting early 1993 and peaking in 1995 was difficult to explain fully by fundamentals and impeded Japan’s recovery starting in 1994.

### Do exchange rates stabilize business cycles?
- Conditions for stabilizing effects:
  - Appreciations with strong growth can moderate expansions via declining net exports.
  - Depreciations during weak activity can spur export-led recovery if competitiveness gains are not offset by rising domestic costs and if monetary policy can reduce interest rates without risking inflation.
- Historical examples:
  - Post-ERM 1992 depreciations (British pound, Italian lira, Swedish krona) aided recoveries, especially in Sweden and the United Kingdom, helped by output gaps allowing monetary easing.
  - Appreciations of the pound and dollar since 1995 helped dampen inflationary pressures in the United Kingdom and United States.
- Reasons stabilizing effects may be limited:
  - Synchronization of business cycles reduces effectiveness of trade balances as adjustment channels.
  - Depreciation can lower real incomes via higher import prices; net domestic demand effect depends on residents’ net foreign currency creditor/debtor positions.
  - Nature of shocks matters; correlations over long periods may be weak.
  - Adjustment lags and concurrent influences (e.g., banking crises) can delay recoveries despite currency depreciation (Mexican peso 1994–95 example).
  - Currency overshooting can cause misallocation and lower output.

### Quantifying the influence of the exchange rate on output (evidence and simulation)
- Key determinants: trade flow price elasticities, responsiveness of trade prices to exchange rates, size and openness of the economy.
- Pricing-to-market and pass-through:
  - Evidence suggests pass-through is incomplete; for U.S. imports pass-through about one-half of exchange rate changes.
  - Hooper and Marquez: pass-through estimates ~85 percent for U.S. exporters, 50 percent to 70 percent for Japan and Europe.
- MULTIMOD simulation (IMF international macroeconometric model) — temporary dollar appreciation scenario:
  - Assumes temporary appreciation resulting from a shift in preferences toward dollar assets; endogenous decline in U.S. interest rates limits actual appreciation to less than assumed.
  - Representative exchange rate movements and impacts:
    - A temporary appreciation of the U.S. dollar of about 15 percent would result in a reduction in aggregate output in the United States of about 1 percent.
    - Representative change in exchange rate defined as 1 standard deviation in the real quarterly effective exchange rate: 15 percent for the United States, 5 percent for Germany, and 20 percent for Japan.
    - For relative output fluctuations typically on the order of 2 to 3 percentage points, a representative exchange rate variation can offset about one-third to one-half of relative cyclical fluctuations.
  - Simulation dynamics by region:
    - United States: initial deterioration in the trade balance in years 1 and 2; offsetting rise in domestic demand from lower interest rates leads to muted aggregate output impact in the medium term.
    - Japan: smaller impact due to lower short-run sensitivity of trade flows to exchange rates.
    - Continental Europe (Euro-3 comprising France, Germany, Italy): larger trade and output responses than Japan and the United States due to higher trade sensitivity.
- Qualifications:
  - Exchange rates best moderate cycles caused by country-specific shocks.
  - Exchange rate effects operate mainly through traded-goods sectors.
  - Exchange rates are market-determined under floating regimes and only indirectly influenced by policymakers.

### Exchange rate variability
- Post-1973 regime:
  - Exchange rates are more variable in the post–1973 generalized floating regime than under Bretton Woods pegs.
  - For the three major industrial countries, data show no clear trend in exchange rate variability since generalized floating began; no statistical support that variability increased in the 1990s.
- Measurement note:
  - Figure 24 shows standard deviations of month-to-month changes in the logarithm of effective exchange rates over moving 24-month windows; other statistics produced similar results.
  - Despite declining inflation since the early 1980s, there is no apparent reduction in exchange rate variability to date; credible monetary policies aimed at price stability could eventually reduce variability.

### European Monetary Union (EMU), business cycles, and exchange rates
- Timing and convergence:
  - Stage 3 of EMU scheduled to begin on January 1, 1999, following sufficient progress toward Maastricht criteria for nominal and financial convergence.
  - Real growth convergence has increased among many EU economies, but notable cyclical differences remain: Germany, France, Italy show slack; smaller countries (Ireland, Netherlands) near capacity.
- Effects of monetary union:
  - Potential for reduced cyclical divergences due to increased integration and policy convergence.
  - Elimination of nominal exchange rate and real interest differential adjustments within the euro area increases risk of regional overheating or stagnation unless product and factor markets are flexible.
  - Transmission of monetary policy via the euro’s external exchange rate may be less powerful, but deeper financial integration could strengthen monetary transmission to real activity.
- Policy implications for EMU members:
  - Monetary union will not be a sudden policy change in 1999 since participants have already maintained relative stability against the deutsche mark and fiscal policies aimed at Maastricht benchmarks.
  - Remaining divergences will tend to show up as differentials in wage and price inflation; member countries need further structural budget deficit reduction to allow fiscal room for stabilization while complying with the Stability and Growth Pact.
  - Structural reforms enhancing market flexibility will aid real convergence and shock adjustment.

### Implications for policy and surveillance
- Persistent cycles and policy roles:
  - Business cycles will persist; policies can reduce amplitude but not eliminate cycles.
  - IMF multilateral surveillance should assess how individual economies’ cyclical developments relate to each other and to the global economy—to judge synchronization and contagion risks.
  - When cycles are not synchronized, international trade, financial links, and exchange rate changes can help moderate domestic fluctuations.
- Policy guidance:
  - Be forward-looking in fiscal and monetary policy to reduce amplitude of fluctuations and avoid destabilizing expectations about the medium term, particularly inflation.
  - Implicit or explicit inflation targeting provides a formal structure for forward-looking monetary policy and can mitigate fluctuations.
  - Active fiscal stabilization has declined since the early 1980s due to deficit/debt concerns and risks of destabilization; improved fiscal positions in many industrial countries have increased the scope for fiscal stabilization but use beyond automatic stabilizers carries risks.
  - Monetary policy generally remains the preferred tool for stabilization, except when nominal interest rates are very low.
  - Policymakers must ensure financial systems and institutions are robust to withstand swings in market sentiment, given international capital flows can be an active and independent source of fluctuations.

*Source: _0598ch3pdf - 1984.  The later stages of the dollar appreciation at the*

### 1984.  The later stages of the dollar appreciation at the

### The Relationship Between Business Cycles and Exchange Rates

### Dollar appreciation and explanation challenges (1984–1985)
- The later stages of the dollar appreciation at the end of 1984 and the beginning of 1985 are described as "more difficult to explain in terms of fundamentals."
- These stages "coincided with both a surging U.S. current account deficit and movements in interest differentials unfavorable to dollar-denominated assets."
- The text states that "bandwagon effects or a speculative bubble played a role in this spike of the dollar." 61

### Subsequent dollar fall and cyclical relationships
- The subsequent fall of the dollar "more closely exhibits the expected relationship with the cycle, with a positive association between the exchange rate and real interest rates, especially the long-term interest differential," starting in the months immediately before the Plaza Agreement of September 1985.
- The rapid decline in the dollar over the year following the Plaza Agreement is characterized as both:
  - "a correction of the previous overshooting" and
  - "a reflection of the fall in U.S. long-term interest rates as inflationary expectations adjusted downward and monetary policy eased."

### Reversal after the Louvre Accord (February 1987)
- The relationship between the dollar and interest differentials "was reversed, however, following the Louvre Accord of February 1987, which sought to foster stability of exchange rates around the prevailing levels."
- The text notes that this Accord led to "an increased perception of inflationary risks" (sentence fragment in source).

### Concepts and measurement notes drawn from the passage
- Risk premium: "The risk premium on the domestic currency measures the amount that the domestic interest rate must exceed the foreign interest rate—after adjusting for the expected change in the exchange rate—to equilibrate asset markets."
  - For given levels of interest rates and the expected future exchange rate, "a decline in the risk premium on the domestic currency implies an appreciation of the currency." 59
- Relative measures: "Interest differentials and relative output gaps are measured relative to a weighted average of the real interest rates and output gaps of the six other major industrial countries, the weights being based on the trade weights used in the calculation of the effective exchange rate indices."
  - Caveat: "Especially for interest rates, however, it must be noted that weights of countries in financial markets may be quite different from their trade weights." 60
- Real effective exchange rate: "The real effective exchange rate is based on consumer prices and is measured relative to 20 industrial countries."

*Source: _0598ch3pdf - 1984.  The later stages of the dollar appreciation at the*

### Box 5.Evaluating Exchange Rates

### Box 5. Evaluating Exchange Rates

### Views on Equilibrium Exchange Rate Calculations
- Three broad perspectives:
  - Exchange rates always reflect fundamentals if markets clear and thus are not substantially out of equilibrium.
  - Exchange rates can be misaligned with fundamentals, but skepticism exists about adequacy of any particular model or set of models.
  - Market rates can become badly misaligned at times; a quantitative framework is needed to identify misalignments early—while recognizing estimates are inherently imprecise and markets warrant deference.
- Estimates of equilibrium exchange rates are inherently imprecise; deviations need careful interpretation and do not automatically call for policy action.

### Approaches to Calculating Equilibrium Exchange Rates
- Purchasing Power Parity (PPP) / international competitiveness measures:
  - Use price or cost indices (consumer price indices, GDP deflators, export prices, unit labor costs).
  - Based on the law of one price for tradable goods; strong evidence rejects the law of one price for short-run behavior.
  - PPP is reconsidered as a long-run hypothesis and framework for medium- to long-run equilibrium exchange rates.
- Macroeconomic balance framework:
  - Originated in IMF work at least as early as summer of 1967.
  - Derives equilibrium exchange rates from estimates of external current account balances consistent with internal balance (full employment without rising inflation).
- Single-equation reduced-form models:
  - Exchange rates as dependent variables, drawing on modified PPP and macroeconomic balance frameworks.
  - Typically derived from net foreign asset accumulation models incorporating trends in productivity, terms-of-trade variables, fiscal balances, and other fundamentals.

### Use of the Macroeconomic Balance Approach at the IMF
- The macroeconomic balance approach: four procedural steps
  - Step 1: Apply a trade-equation model to estimate underlying current account positions at prevailing market exchange rates if countries produce at potential output.
  - Step 2: Use a separate model to estimate “equilibrium” or “normal” saving-investment positions based on medium-run determinants, assuming production at potential output.
  - Step 3: Calculate, in a multilateral framework, the exchange rate changes required, other things equal, to equilibrate underlying current accounts with equilibrium saving-investment positions simultaneously.
  - Step 4: Make judgmental assessments on whether calculated adjustments indicate badly misaligned currencies.
- Key features and caveats:
  - Primary motivation is to identify cases of badly misaligned exchange rates, not to prescribe targets.
  - Focuses on medium-run equilibrium by assuming countries at potential output.
  - Provides multilateral, globally consistent assessment of external positions.
  - Emphasizes real multilateral (not nominal bilateral) exchange rates.
  - Results are inputs requiring judgmental interpretation, considering cyclical positions, structural changes, and market expectations.
  - Applications have been largely confined to industrial countries due to data limitations and assumptions of high capital mobility.

### Interpreting Deviations from Medium-Run Equilibrium
- Substantial deviations do not automatically mean “markets are wrong”:
  - Deviations can reflect different phases of business cycles where markets expect gradual adjustments toward medium-run equilibria—these expectations are normally reflected in interest differentials and forward rates.
  - Deviations may indicate “policies are wrong,” e.g., when large interest differentials reflect market concerns about large fiscal imbalances.
  - Deviations against a background of sound policies and narrow interest differentials may suggest true misalignment.
- No general prescription for action when large deviations are observed; decisions must be case-by-case within a broader macroeconomic assessment, conditioned by policy consistency with ultimate targets and the extent of exchange rate deviation.

### Relationship Between Business Cycles and Exchange Rates (Findings)
- Casual inspection and econometric research provide mixed evidence on systematic relationships between exchange rates, interest differentials, and cyclical variables; short-term exchange rate changes largely appear random.
- Stronger relationships emerge when focusing on lower-frequency components with horizons of 1!/2 to 8 years (frequencies corresponding to typical business cycles).
- Simultaneity complicates estimation: policy reactions and exchange-rate effects on aggregate demand cause two-way causation.
- Examples discussed:
  - U.S. dollar declines in 1987 despite higher interest rates as monetary policy responded.
  - Deutsche mark appreciation around 1986 and from 1991 linked partly to German reunification and fiscal/external deficits to finance eastern Länder investment.
  - Yen appreciation starting early 1993 and peaking in 1995 was difficult to explain fully by fundamentals and impeded Japan’s recovery starting in 1994.

### Do Exchange Rates Stabilize Business Cycles?
- Exchange rates can stabilize output depending on circumstances:
  - Appreciations with strong growth can moderate expansions via declining net exports.
  - Depreciations during weak activity can spur export-led recovery if competitiveness gains are not offset by rising domestic costs and if monetary policy can reduce interest rates without risking inflation.
- Historical examples:
  - Post-ERM 1992 depreciations (British pound, Italian lira, Swedish krona) aided recoveries, especially in Sweden and the United Kingdom, helped by output gaps allowing monetary easing.
  - Appreciations of the pound and dollar since 1995 helped dampen inflationary pressures in the United Kingdom and United States.
- Reasons stabilizing effects may be limited:
  - Synchronization of business cycles reduces effectiveness of trade balances as adjustment channels.
  - Depreciation can lower real incomes via higher import prices; net domestic demand effect depends on residents’ net foreign currency creditor/debtor positions.
  - Nature of shocks (e.g., exogenous interest rate changes vs. demand shocks) matters; correlations over long periods may be weak.
  - Adjustment lags and concurrent influences (e.g., banking crises) can delay recoveries despite currency depreciation (Mexican peso 1994–95 example).
  - Currency overshooting can cause misallocation and lower output.

### Quantifying the Influence of the Exchange Rate on Output
- Key determinants: trade flow price elasticities, responsiveness of trade prices to exchange rates, size and openness of the economy.
- Pricing-to-market and pass-through:
  - Evidence suggests pass-through is incomplete; for U.S. imports pass-through about one-half of exchange rate changes.
  - Hooper and Marquez: pass-through estimates ~85 percent for U.S. exporters, 50 percent to 70 percent for Japan and Europe.
- MULTIMOD simulation (IMF international macroeconometric model) — temporary dollar appreciation scenario:
  - Assumes temporary appreciation resulting from a shift in preferences toward dollar assets; endogenous decline in U.S. interest rates limits actual appreciation to less than assumed.
  - Representative exchange rate movements and impacts:
    - A temporary appreciation of the U.S. dollar of about 15 percent would result in a reduction in aggregate output in the United States of about 1 percent.
    - Representative change in exchange rate defined as 1 standard deviation in the real quarterly effective exchange rate: 15 percent for the United States, 5 percent for Germany, and 20 percent for Japan.
    - For relative output fluctuations typically on the order of 2 to 3 percentage points, a representative exchange rate variation can offset about one-third to one-half of relative cyclical fluctuations.
  - Simulation dynamics:
    - U.S.: initial deterioration in the trade balance in years 1 and 2; offsetting rise in domestic demand from lower interest rates leads to muted aggregate output impact in the medium term.
    - Japan: smaller impact due to lower short-run sensitivity of trade flows to exchange rates.
    - Continental Europe (Euro-3 comprising France, Germany, Italy): larger trade and output responses than Japan and the United States due to higher trade sensitivity.
- Qualifications:
  - Exchange rates best moderate cycles caused by country-specific shocks.
  - Exchange rate effects operate mainly through traded-goods sectors.
  - Exchange rates are market-determined under floating regimes and only indirectly influenced by policymakers.

### Exchange Rate Variability
- Exchange rates are more variable in the post–1973 generalized floating regime than under Bretton Woods pegs.
- For the three major industrial countries, data show no clear trend in exchange rate variability since generalized floating began; no statistical support that variability increased in the 1990s.
- Measurement note: Figure 24 shows standard deviations of month-to-month changes in the logarithm of effective exchange rates over moving 24-month windows; other statistics produced similar results.
- Despite declining inflation since the early 1980s, there is no apparent reduction in exchange rate variability to date; credible monetary policies aimed at price stability could eventually reduce variability.

### European Monetary Union (EMU), Business Cycles, and Exchange Rates
- Stage 3 of EMU scheduled to begin on January 1, 1999, following sufficient progress toward Maastricht criteria for nominal and financial convergence.
- Real growth convergence has increased among many EU economies, but notable cyclical differences remain: Germany, France, Italy show slack; smaller countries (Ireland, Netherlands) near capacity.
- Effects of monetary union:
  - Potential for reduced cyclical divergences due to increased integration and policy convergence.
  - Elimination of nominal exchange rate and real interest differential adjustments within the euro area increases risk of regional overheating or stagnation unless product and factor markets are flexible.
  - Transmission of monetary policy via the euro’s external exchange rate may be less powerful, but deeper financial integration could strengthen monetary transmission to real activity.
- Policy implications:
  - Monetary union will not be a sudden policy change in 1999 since participants have already maintained relative stability against the deutsche mark and fiscal policies aimed at Maastricht benchmarks.
  - Remaining divergences will tend to show up as differentials in wage and price inflation; member countries need further structural budget deficit reduction to allow fiscal room for stabilization while complying with the Stability and Growth Pact.
  - Structural reforms enhancing market flexibility will aid real convergence and shock adjustment.

### Implications for Policy and Surveillance
- Business cycles will persist; policies can reduce amplitude but not eliminate cycles.
- IMF multilateral surveillance should assess how individual economies’ cyclical developments relate to each other and to the global economy—to judge synchronization and contagion risks.
- When cycles are not synchronized, international trade, financial links, and exchange rate changes can help moderate domestic fluctuations.
- Distinguishing exchange rate movements warranted by cyclical divergences from those due to medium-term fundamental changes or misalignments is challenging except in extreme cases.
- Policy guidance:
  - Be forward-looking in fiscal and monetary policy to reduce amplitude of fluctuations and avoid destabilizing expectations about the medium term, particularly inflation.
  - Implicit or explicit inflation targeting provides a formal structure for forward-looking monetary policy and can mitigate fluctuations.
  - Active fiscal stabilization has declined since the early 1980s due to deficit/debt concerns and risks of destabilization; improved fiscal positions in many industrial countries have increased the scope for fiscal stabilization but use beyond automatic stabilizers carries risks.
  - Monetary policy generally remains the preferred tool for stabilization, except when nominal interest rates are very low.
  - Policymakers must ensure financial systems and institutions are robust to withstand swings in market sentiment, given international capital flows can be an active and independent source of fluctuations.

*Source: Box 5. Evaluating Exchange Rates, from the IMF chapter provided.*

---


_Source: https://www.imf.org/-/media/websites/imf/imported-flagship-issues/external/pubs/ft/weo/weo0598/pdf/_0598ch3pdf.pdf_