Parents who do not have their children immunized and attempt to benefit from other parents who did have their own children immunized are exhibiting an economic behavior known as

What is the relationship between surface winds in the northern and southern hemisphere?

Any study/memorization tips? i have exams in a week and it would be great to try suggestions!you ; )

As nina and erin were eating lunch in the central high school student cafeteria, they were discussing the news coverage about the girls' athletic coach being arrested for selling steroids to student athletes. "i think the guy just did it because they don't pay teachers enough money," nina suggested. "i bet the guy had some other kind of drug addiction he was trying to pay for," erin countered. nina and erin's ideas about the cause of the coach's drug-selling behavior are examples of: