每天喝八大杯水並無理論根據？兒童汽車座椅遠不如安全帶來得安全？游泳池其實比槍枝還要危險？父母參加家長會的重要性遠超過帶小孩上博物館？.....
本書旨在探尋每件事物背後隱藏的一面，剝去現代生活的一兩層表皮，以觀察內部的運作狀況。作者發明了一個全新的研究領域：蘋果橘子經濟學──用經濟學的剖刀切開擁有蘋果外表的橘子果實。這種剖刀憑藉的是經濟學裡俯拾皆是的工具，不同的只是改從最有趣而關鍵的點切入。

Which is more dangerous, a gun or a swimming pool? What do schoolteachers and sumo wrestlers have in common? Why do drug dealers still live with their moms? How much do parents really matter? What kind of impact did Roe v. Wade have on violent crime?

These may not sound like typical questions for an economist to ask. But Steven D. Levitt is not a typical economist. He is a much heralded scholar who studies the stuff and riddles of everyday life -- from cheating and crime to sports and child rearing -- and whose conclusions regularly turn the conventional wisdom on its head. He usually begins with a mountain of data and a simple, unasked question. Some of these questions concern life-and-death issues; others have an admittedly freakish quality. Thus the new field of study contained in this book: freakonomics.