Question: 9.4 What is sample selection bias? Suppose you read a study using data on college graduates of the effects of an additional year of schooling

9.4 What is sample selection bias? Suppose you read a study using data on college graduates of the effects of an additional year of schooling on earnings. What is the potential sample selection bias present?

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9.4 What is sample selection bias? Suppose you read a study using data on college graduates of the effects of an additional year of schooling on earnings. What is the potential sample selection bias?

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