Read the box The Demand for Economics Journals in Section 8.3. Discuss the internal and external validity

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Read the box "The Demand for Economics Journals" in Section 8.3. Discuss the internal and external validity of the estimated effect of price per citation on subscriptions.
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Introduction to Econometrics

ISBN: 978-0133595420

3rd edition

Authors: James H. Stock, Mark W. Watson

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