It is also possible that the exchange rate will not return to the long-run average if one economy is hit by a huge structural change. But such changes occur less frequently than is often supposed or alleged.
Les taux de change peuvent ne pas revenir vers leur moyenne sur le long terme si l'une des économies subit un bouleversement structurel ; mais ce genre de choses survient moins souvent que l'on ne le croit ou que l'on ne le dit.