In the theory of competitive markets, agents act as if they do not affect prices. By analogy with the language of econometrics, agents may be said to take prices as "exogenously given," which suggests that prices are econometrically exogenous in individual behavioral equations. This involves semantic confusion between different meanings of the word "exogenous." Simultaneity problems cannot be dispelled by working with disaggregated data. In particular, nothing is gained by disaggregating the dependent variable in a regression equation if the "micro" and the "macro" equations use the same regressors. However, there may be substantial gains from disaggregation of the regressors. Copyright 1989 by The Review of Economic Studies Limited.
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Volume (Year): 56 (1989) Issue (Month): 1 (January) Pages: 151-56 Download reference. The following formats are available: HTML
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