Which is more accurate, iResearch data or cnzz?

IResearch counts the number of search requests, that is, the user's "search behavior data" in the search box. The repeated search of the same keyword by a single user in a single day is not counted, and the page turning rate and click volume do not affect this statistic; In fact, CNZZ realizes the reverse link location technology through the statistical code of its sample websites (about hundreds of thousands of effective websites), that is, it locates its jump source through Http _ Referre, and then counts the market share of related search engines. The difference between search request volume and search external distribution volume. The network index of iResearch statistics is the amount of search requests, and the index of CNZZ statistics is the amount of search external distribution. External distribution refers to the traffic that search engines distribute to external websites. Similarly, there are internal distribution and zero distribution. Internal distribution refers to the diversion of search engines to internal websites. For example, the diversion of Baidu search to Baidu encyclopedia, know, pictures, videos and other direct lines is internal distribution. Zero distribution means that after the search results page meets the needs of users, users no longer click on any website links. CNZZ can only count external distribution, because as Citigroup analysts said, CNZZ has sampled hundreds of thousands of small and medium-sized websites, and it is impossible for large websites such as Sina and Netease, and Baidu's clique such as Baidu Encyclopedia, to allow CNZZ page numbers, so CNZZ will lose the important traffic distribution channel of searching internal distribution. In addition, in the external distribution of search, CNZZ can't capture the traffic distribution of search engines to large websites. Similarly, CNZZ can't capture the zero distribution of search, but we know that a search without any clicks is also a search behavior. The difference between Baidu and other small and medium-sized search engines. Baidu search results are obviously different from other search engines, that is, Baidu search has a high recommendation weight for Baidu's own products. Enter any popular word, such as basketball star, and we find that Page 1 is basically occupied by Baidu linear clicks such as encyclopedia, knowledge and pictures. Page 1 has at most two non-Baidu linear website links, which may not be within the sampling range of CNZZ. Therefore, we think that the recommendation weight of Baidu search for small and medium-sized websites is lower than the normal level, and correspondingly, the recommendation weight of other small and medium-sized search engines for small and medium-sized websites is relatively high (relative to Baidu).