Final answer:
Living cost indexes help expatriates compare costs between countries, aiding in financial decisions and maintaining their standard of living abroad.
Step-by-step explanation:
Indexes of living costs abroad enable expatriates to compare the cost of living between their home country and the country they are considering moving to or currently residing in. These indexes take into account various factors such as housing, food, transportation, healthcare, and other necessities. By understanding these costs, expatriates can make informed decisions about their finances, such as negotiating salaries, managing budgets, and maintaining their desired standard of living while working abroad.