1. Under what circumstances could measuring opportunity cost prevent you from making a rational decision? During the early 2000s, many of the member countries of the Gulf Cooperation Council (GCC) witnessed an unprecedented increase in per capita income. Along with the revenue boom from oil exports and improvements in sectors like education, health, and construction, many families now enjoy higher living standards. This has created a notable change in the family structure as well. A new phenomenon has been observed—with a large number of foreign investors entering the market and taking advantage of the investment opportunities in this fast-growing economy, labor mobility became parallel to the income flow in the Gulf region. In this context of economic development, the number of paid help, especially nannies, hired to take care of children and homes has increased.