“世上没有免费的午餐”是经济学谚语。“免费午餐”据说起源于19世纪的美国,当时一些酒吧为了招徕顾客,打出“本店免费提供三明治”的广告,前提是顾客要掏钱买一杯啤酒。当然如果不花钱就想得到这份三明治是不可能的。虽然三明治的价格要高于一杯酒的价格,但顾客们往往会多次惠顾并买多杯酒,所以酒吧依然能收回成本。在商业史上,吉列剃须刀是利用免费模式营销的经典案例。该产品的创始人、美国人金·吉列用很便宜的价 “There is no free lunch in the world ” is an economic proverb. “Free Lunch ” is said to have originated in the United States in the 19th century, when some pubs advertised their customers for “free sandwiches at our stores,” provided the customers had to pay for a beer. Of course it would not have been possible to get the sandwich without spending money. Although the price of a sandwich is higher than the price of a glass of wine, patrons often patronize and buy many glasses of wine several times, so the bar can still recover the cost. In business history, Gillette razors are a classic case of using free mode marketing. The product’s founder, the American Kim Gillette at a very cheap price