当年,张五常先生年宵之夜在香港街头卖橘,并写下3名篇《卖橘者言》,文章末尾对价格歧视理论作了两点发挥:第一,价格歧视未必需要将市场分开或将顾客分开;第二,价格歧视不以顾客需求弹性不同为条件。读来让人兴致盎然,拍案叫绝。不过,当初在读该文时,笔者就曾突发奇想,五常先生的观察是由卖橘者的角度得之,如果他不是卖橘,而是去买橘的话,他的发现会不会有所不同呢?这个疑问在心中盘桓了许久,由于缘悭一面,一直未有机会向五常先生当面请教。笔者也曾自问自答这个问题、也许五常先生作卖者相比买者而言有一些额外的好处。一是卖者信息上相对买者更优,所谓“买的总不如卖的精”是也。譬如说,五常先生入货的成本价是每盆40元,这一信息恐怕就只有天知、地知、批发商和他本人知道了,普通购买者 In the same year, Mr. Zhang Wuchang sold Tangerines on the streets of Hong Kong on the night of the Lunar New Year and wrote three articles, “Selling Oranges,” at the end of which made two points of play in the theory of price discrimination: First, price discrimination may not necessarily separate the market Or to separate customers; second, price discrimination is not conditional on the flexibility of customer needs. Read to make people excited, make a fate. However, when I first read this article, I had a sudden whim, Mr. Wu Chang’s observation is from the perspective of selling oranges, if he is not selling oranges, but to buy orange, then his findings will not have Different? This question linger in the heart for a long time, because of fate, has not had the opportunity to face to Mr. Wu Chang advice. I have also asked myself this question, and perhaps Mr. Wu Chang has some extra advantages over the buyer as a seller. First, the seller is better information on the relative buyers, the so-called “buy better than selling fine ” is also. For example, Mr. Wu Chang, the cost of goods is imported 40 yuan per pot, I am afraid this information is only God knows, to know, the wholesaler and himself know, ordinary buyers