p Own-Price Changes Fixed p2 and y p X1 (p1) X, x1(p1) x1(p1) x1(p1,)x2 x x1 1 *(p1 ’) x1 *(p1 ’’) p1 x1 *(p1 ’) x1 *(p1 ’’) p1 ’ p1 ’’ x1 * Own-Price Changes Fixed p2 and y