Consumer's surplus + A consumer's reservation-price curve is not quite the same as her ordinary demand curve. Why not? + A reservation-price curve describes sequentially the values of successive single units of a commodity An ordinary demand curve describes the most that would be paid for g units of a commodity purchased simultaneously.◆A consumer’s reservation-price curve is not quite the same as her ordinary demand curve. Why not? ◆A reservation-price curve describes sequentially the values of successive single units of a commodity. ◆An ordinary demand curve describes the most that would be paid for q units of a commodity purchased simultaneously. Consumer’s Surplus