“信息理论”最初是无线电广播领域的课题,现在“信号一噪音比”这个概念已被广泛直用,任何需要清除干扰的传播渠道都要考虑这个比率。在传统的“短头”市场中,这不是个多么大的问题,因为货架上的所有东西都已经过事先过滤,另类的玩意儿和其他非大众化的产品都已经被清除一空。但在一个无奇不有的长尾市场中,噪音有可能成为一个大问题。过滤器的职责就是清除这些噪音。就像是小麦脱粒或是雕琢钻石一样,过滤器的任务就是挑选出人们想要的精华部分,滤除人们不想要的多余部分。人们最常犯的错误之一就是根据销售状况来判断产品优劣——也就是说,卖得不好的东西一定比卖得好的东西要“差”。但是利基市场的经济学不同于主流经济学。 “Information Theory ” was originally a topic in the field of radio broadcasting. Now the concept of “signal-to-noise ratio” has been widely used. Any transmission channel that needs to be cleared of interference should consider this ratio. This is not a big issue in the traditional “short head” market, as everything on the shelves has been filtered in advance, and alternative gadgets and other non-popular products have been cleared. But in an odd long tail market, noise can become a big problem. The job of the filter is to remove these noises. Just like wheat threshing or carving diamonds, the task of a filter is to pick out the essences that people want and filter out the extraneous parts that people do not want. One of the most common mistakes people make is judging the pros and cons of products based on their sales - that is, something that is not selling well must be “worse” than something that is selling well. But the niche market economics is different from mainstream economics.