31. The aggregate demand curve 's downward slope means that more output is demanded at lower price levels. 32. We want to keep behind the demand curve , 33. Auctions are theoretically a very efficient form of commerce, the perfect nexus of the supply-and-demand curves . 34. Second the slope of the marginal revenue curve is twice that of the inverse demand curve . 35. In a monopolistic market, the demand curve facing the monopolist is simply the market demand curve . 36. They have an advantage over the average tech stock in that the demand curve is vertical. 37. "We tested the supply-and-demand curve , " he said, " and it needs to be amended ." 38. Once consumers understand that airlines are trying to hug the demand curve , ticketing becomes more intelligible. 39. Thus, examining the appropriate aggregation factors will ensure more reasonable interpretation of the aggregate demand curve . 40. Such improvements shift tenants'demand curve to the right.