Why can we not use first differences when we have independent cross sections in two years (as

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Why can we not use first differences when we have independent cross sections in two years (as opposed to panel data)?

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Introductory Econometrics A Modern Approach

ISBN: 978-0324660548

4th edition

Authors: Jeffrey M. Wooldridge

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Question Posted: Apr 21, 2016 04:57 AM

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Why can we not use first differences when we have independent cross sections in two years (as

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We do not have repeated observations on the same crosssectional units in each time peri...View the full answer

Introductory Econometrics A Modern Approach

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