EOC Reading 35 exercise 10 (volume 6)

Is the answer correct? It seems interaction effect, not the alloctaion effect as asked.

They’re using the Brinson-Fachler approach; see p. 201.

Thank I was think the program should use the alloctaion effect described in page 181. (Equation 3).

Makes sense what you saw because in the question isrelated to micro attribution.