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CHAPTER 2 THINKING LIKE AN ECONOMIST 45
minivan comes before the baby,
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of minivans causes the population to grow,
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There is no complete set of rules that says when it is appropriate to draw
causal conclusions from graphs. Yet just keeping in mind that cigarette lighters
don't cause cancer (omitted variable) and minivans don't cause larger fam-
ilies (reverse causality) will keep you from falling for many faulty economic
arguments.
IN THIS CHAPTER
YOU WILL . . .