A reinterpretation of interactions in regressions
J Hirschberg, J Lye
Applied Economics Letters | ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD | Published : 2010
Regression specifications in applied econometrics frequently employ regressors, which are defined as the product of two other regressors to form an interaction. Unfortunately, the interpretation of the results of these models is not as straight forward as in the linear case. In this article, we present a method for drawing inferences for interaction models by defining the partial influence (PI) function. We present an example that demonstrates how one may draw new inferences by constructing the confidence intervals for the PI functions based on the traditional published findings for regressions with interaction terms. © 2010 Taylor & Francis.