That is because when a country, any country. Willfully making their own travel funds depreciate, distorted by conditions that occurred. The country may be better off sending in early stage.
That is because when one country. Voluntarily reduce the value of their own money into a distortion of equilibrium occurs. Countries that are subject to export better in the early stages.
That's because when a particular country. Deliberately was affected their money down to deviate from the equilibrium occurs. That country may have better long-term exports first.