North–South divide in Taiwan
Because of the expensive housing price, people in northern Taiwan have no choice but cut their desire to have babies. At the same time, southern Taiwanese don't have enough money to own a baby. So southern Taiwanese cut their desire to have babies, too. These lead to very low birth rate in Taiwan. After many southern Taiwanese moved to northern Taiwan, because they didn't own a house in northern Taiwan and were new to the environment, these movers' pockets generally not deep enough to pay a new house to start a family.