Long-Run Trends in the Real Exchange Rate?

Long Run, implies that costs of merchandise and ventures, and of the components of creation that form those products, conform to market interest conditions with the goal that the goods market and money market are at full employment.

Real exchange rate is the exchange rate at which real goods and services are traded between economies.

It is the buying power of a currency relative to another currency, at a given nominal exchange rate and price.

Factors that lead to different trends in the Real Exchange Rate are described as follows :

• Purchasing Power Parity (PPP) is the utilization of the law of one cost to the economies. It predicts that trade rates will conform to relative value level changes, to differential rate of inflation between two nations. They without a doubt do, however just over the long haul and not to definitely a similar degree. 
• In the long run, trade rates are dictated by PPP and through relative contrasts in profitability (or, productivity), barriers to trade, as well as through level of imports/exports.

Suppose, there are 2 countries : Country A & Country B 

As Country A's cost level and imports increase, and as Country A's production efficiency, goes down in comparison to Country B, Country A's money depreciates and Country B's appreciates. 

Fundamentally, anything that brings down interest for Country A's products, and money instigates their currency to deteriorate; whatever expands interest for Country A's stuff incites the currency to appreciate accordingly. 

Higher rate of inflation comparative with Country B makes Country A's stuff look more extravagant, bringing down interest and leading to depreciation of currency of country A. 

On the off chance that economic agents in Country A like Country B's stuff, they will import it regardless of whether Country A's money depreciates, thereby, making Country B's stuff more costly. Decreases in exchange hindrances (lower duties, higher quotas) will intensify that. 

In the event that, for reasons unknown, economic agents in Country B don't care for Country A's stuff however much they used to, they'll purchase less of it except if Country A's cash depreciates, making it less expensive. 

Lastly, if Country A's productive efficiency slips, in comparison to Country B's, Country A's products and enterprises will get more costly than Country B's so it will sell in Country B, only if its currency depreciates.