Exchange Rate Overshooting Quiz: Dornbusch Model

This specific model explains how exchange rates can be more volatile than underlying economic fundamentals. It suggests that because prices of goods are slow to adjust while financial markets react instantly, the currency value must move excessively in the short term. This ensures that the expected returns on domestic and foreign assets remain balanced while the rest of the economy catches up.

The answer is True. In financial markets, currency prices change in milliseconds as investors process new information. However, the prices of physical goods, wages, and services are sticky and take much longer to change. This difference in adjustment speeds forces the exchange rate to compensate by moving further than necessary initially, before eventually settling at a more stable long term level.

Overshooting requires that financial capital can move freely across borders and that commodity prices do not adjust immediately. When a central bank changes interest rates, capital flows move the currency value right away. Because the prices of goods remain unchanged for months, the currency must move significantly to maintain equilibrium in the financial sector, creating the characteristic spike or dip in value.

When the money supply increases, interest rates drop, leading to an immediate depreciation. Because goods prices haven't adjusted yet, the currency value falls further than its eventual long term equilibrium. This excessive drop is necessary to create an expectation of future appreciation, which offsets the lower interest rates and keeps international investors willing to hold that specific national currency.

The answer is False. The model actually demonstrates that overshooting is a rational response to economic shocks when different sectors of the economy adjust at different speeds. Even though the price movement seems extreme, it is a logical adjustment required to equalize returns on assets when goods prices are stuck. It shows that volatility does not necessarily mean the market is failing.

As domestic prices finally rise, the real money supply shrinks and interest rates begin to recover. This process causes the currency to gradually appreciate from its initially overshot, depreciated position. The currency eventually lands at a new long term equilibrium that is lower than its original starting point but higher than the extreme low reached during the initial overshooting phase.

In the long term, a permanent increase in money supply leads to a higher overall price level and a proportional depreciation of the currency. According to the principle of monetary neutrality, the interest rate and total output eventually return to their original levels. The overshooting effect is purely a transitional phenomenon that occurs while the economy moves from one steady state to another.

This condition is central to the model because it states that the difference in interest rates between two countries must equal the expected change in their exchange rate. If a country lowers its interest rate, its currency must be expected to appreciate in the future to keep investors interested. To create that expectation of future appreciation, the currency must first drop or overshoot downward.

The answer is True. Because consumer prices change slowly, they do not absorb the immediate impact of economic shocks. Instead, the exchange rate, which is a flexible asset price, takes the full brunt of the adjustment. This results in currency values swinging much more widely on a daily or monthly basis than the actual inflation rate or the price of common household goods.

A decrease in the money supply raises interest rates, attracting capital and causing the currency to appreciate instantly. Because prices are sticky, the currency will appreciate significantly beyond its long term target. This over-appreciation makes domestic goods very expensive abroad temporarily, until the domestic price level eventually falls and the exchange rate moves back down to its new, stable equilibrium point.

The transition path is characterized by a steady move toward the final equilibrium as the rest of the economy adjusts. As stickiness in the goods market fades and prices reach their new levels, the pressure on the exchange rate to compensate decreases. This results in a predictable, non-random adjustment period where the currency reverses some of its initial extreme movement to reach a stable state.

The answer is True. The model relies on the idea that market participants understand the long term path of the economy. Investors realize that the currency will eventually reach a certain value based on the new money supply. Their rational actions based on these expectations are exactly what cause the exchange rate to jump to the overshot level in the immediate aftermath of a policy change.

Overshooting creates temporary price distortions because the exchange rate moves much faster than the costs of production. If a currency over-depreciates, exports become artificially cheap for a short period, potentially creating a temporary boom. Conversely, if it over-appreciates, exporters may struggle significantly until the domestic price level adjusts downward to restore the real competitiveness of the nations goods and services in global markets.

Rudiger Dornbusch developed this influential model in 1976. His work was revolutionary because it provided a theoretical explanation for why exchange rates were so much more volatile than anyone had predicted after the collapse of the fixed rate system. It remains a foundational concept for undergraduate students studying international macroeconomics and the behavior of modern floating exchange rate regimes.

The answer is False. If every price in the economy could change instantly, there would be no need for the exchange rate to move excessively. All markets would adjust to a new equilibrium at the same time. Overshooting is specifically caused by the friction and delay in the goods market. Without price stickiness, the exchange rate would simply move directly to its new long term level without any spikes.