北京大学：《微观经济学》Chapter Sixⅸ Demand 需求

Own-Price Changes Fixed p2 and y P1X1 p2x2 =y P1=p p1=p X1

Own-Price Changes x1 x2 p1= p1 ’’ p1 = p1 ’ Fixed p2 and y. p1x1 + p2x2 = y

Own-Price Changes Fixed p2 and y P1X1 p2x2 =y Pup p p1=p1 X1

Own-Price Changes x1 x2 p1= p1 ’’ p1= p1 ’’’ Fixed p2 and y. p1 = p1 ’ p1x1 + p2x2 = y

Own-Price Changes Fixed p2 and y X2 pup x1*(p1)

x2 x x1 1 *(p1 ’) Own-Price Changes p1 = p1 ’ Fixed p2 and y

p1 Own-Price Changes Fixed p2 and y X2 pup p x1(P1)x1 x1*(p1)

x2 x x1 1 *(p1 ’) p1 x1 *(p1 ’) p1 ’ x1 * Own-Price Changes Fixed p2 and y. p1 = p1 ’

p1 Own-Price Changes Fixed p2 and y X2 p1=p1” p x1(P1)x1 1(p1)

x2 x x1 1 *(p1 ’) x1 *(p1 ’’) p1 x1 *(p1 ’) p1 ’ p1 = p1 ’’ x1 * Own-Price Changes Fixed p2 and y