Question

经济学基础的练习题,麻烦大家看看

Answer 1

QD = QS

28 - 6P = 4 + 12P

解出均衡价格

P = 4/3 = 1.33

均衡量 = QD = 28 - 6P = 28 - 6*4/3 = 20

价格弹性 = -(dQD/dP)*(P/QD) = -(-6)*(4/3/20) = 2/5 = 0.4