Building a competitive search engine would require upwards of $300 million in capital investments, according to PrabhakarRaghavan, chief strategist for Yahoo Search. The BOSS API is based on Yahoo's full index of Web search, news and image search...
The ZDNet article: Yahoo's new search master, offers a profile of and comments from PrabhakarRaghavan, a legend in the world of online info retrieval and the just hired person in charge of Yahoo Research Labs.
Variable latent semantic indexing
by Ravi Kumar, PrabhakarRaghavan, Andrew Tomkins PrabhakarRaghavan is joining Yahoo to run the YRL. Second, a redesigned version of the YRL web site is now online. Unweaving a web of documents
by Ravi Kumar