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第二讲 需求 供给 弹性(一) 每个市场都有买者(buyers)和卖者(sellers),购买者根据不同的价格来购买某种物品的意愿(willing)称为购买者对该种物品的需求;而卖者根据某种物品的不同价格来提供这种物品的意愿称为卖者对该种物品的供给(supply)。 一、需 求(demand) 购买者的需求可以由一份需求表(demand schedule)表示,这个需求表列出了购买者根据某种物品的不同价格而愿意购买这种物品的数量。表1给出了某种特定物品X的一个需求表,值得一提的是,当物品X的价格上升(increase)时,物品X的需求量则会下降(de-crease)
Second, the supply elasticity of demand (A) each market has buyers (buyers) and sellers (buyers) sellers according to different prices to buy an item willing (willing) is called the buyer of the item ; And the willingness of the seller to provide the item at a different price for the particular item is called the seller’s supply of the item. Demand A buyer’s needs can be represented by a demand schedule, which lists the number of buyers who are willing to purchase such items based on their price. Table 1 shows a demand table for a particular item X. It is worth mentioning that when the price of item X increases, the demand for item X will de-crease.