Explain the interrelations among nominal exchange rate, real exchange rate andpurchasing power parity exchange rate.

The interrelations among nominal exchange rate, real exchange rate, and purchasing power parity exchange rate can be explained as follows:

1. Nominal Exchange Rate: The nominal exchange rate is the rate at which one currency can be exchanged for another currency. It represents the value of one currency in terms of another currency. For example, if the nominal exchange rate between the US dollar and the euro is 1.10, it means that one US dollar can be exchanged for 1.10 euros.

2. Real Exchange Rate: The real exchange rate takes into account the relative prices of goods and services between two countries. It is calculated by adjusting the nominal exchange rate for the differences in inflation rates between the two countries. The real exchange rate reflects the purchasing power of a currency in terms of goods and services.

3. Purchasing Power Parity (PPP) Exchange Rate: The purchasing power parity exchange rate is a theoretical exchange rate that equalizes the purchasing power of different currencies. It is based on the idea that in the long run, the prices of goods and services should be similar across countries when expressed in a common currency. The PPP exchange rate is calculated by comparing the price levels of a basket of goods and services in different countries.

The interrelations among these three exchange rates can be summarized as follows:

• The nominal exchange rate is influenced by factors such as interest rates, inflation rates, and market forces. It determines the relative value of currencies in the foreign exchange market.

• The real exchange rate takes into account the differences in inflation rates between countries. It reflects the purchasing power of a currency and determines the competitiveness of a country's goods and services in international markets.

• The purchasing power parity exchange rate is a theoretical concept that suggests that the real exchange rate should be equal to one. In other words, the prices of goods and services should be similar across countries when expressed in a common currency.

• In practice, the actual exchange rates may deviate from the purchasing power parity exchange rate due to various factors such as trade imbalances, government policies, and market expectations.

Overall, the nominal exchange rate, real exchange rate, and purchasing power parity exchange rate are interconnected and influence each other in determining the value of currencies and the purchasing power of individuals and businesses in international trade.