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Answer.... Alcohol Consumption in California Proportion Drank Last Month LO Drank Beta =0.198, se = 0.039 O 19 20 21 22 23 Age at Time

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Alcohol Consumption in California Proportion Drank Last Month LO Drank Beta =0.198, se = 0.039 O 19 20 21 22 23 Age at Time of Survey Question 1 If people systematically underreport their drinking how will this bias our estimate of the first stage. Work through the case where 1/4 of people that drink claim they don't. How much will this bias the estimate of the first stage? Question 2 It turns out that due to confidentiality reasons exact age is not available. We only have age plus or minus three weeks to fit our regression on. How will this affect our estimate of the first stage

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