Mark each of the following statements as True or False and provide a one or two sentence explanation for your answer.

1. Population growth in the developed world is contributing to population aging.
2. In the 1970s, researchers were worried that while Americans were living longer than previous generations, they were less healthy during old age than before. This is known as the "compression of morbidity."
3. If a costless drug were created that effectively cured a prevalent and deadly disease, health care expenditures would decrease.
4. Aggressive natalist policies have successfully reversed birth rate declines in most European countries.