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We have encountered econometric models in which it was a good idea to include "interaction" variables amongst our independent variables b. Suppose...
a. We have encountered econometric models in which it was a good idea to include “interaction” variables amongst our independent variables
b. Suppose you run the following regression: , where X is a continuous variable and is always positive. D is a dummy variable, and X*D is an interaction variable of X and D. Furthermore, suppose that you estimate the following signs for the coefficients: On a single graph with the X variable on the X-axis, and Y variable on the Y-axis, make rough sketches of the regression lines for the cases D=0 and D=1 that are possible given the signs of the coefficients given above. Be sure to clearly label your axes, slopes, and intercept values. You should upload an image of this graph. If you draw it by hand, photograph and upload it as an attachment using the link below If you create the graph within the computer, upload the file of it using the link below.