Microsoft’s assault on Google in Internet search and search advertising may be the steepest competitive challenge in business today. It is certainly among the most costly. Trying to go head-to-head with Google costs Microsoft upward of $5 billion a year, industry executives and analysts estimate.
As the overwhelming search leader, Google has advantages that tend to reinforce one another. It has the most people typing in searches — billions a day — and that generates more data for Google’s algorithms to mine to improve its search results. All those users attract advertisers. And there is the huge behavioral advantage: "Google" is synonymous with search, the habitual choice.
Once it starts, this cycle of prosperity snowballs — more users, more data, and more ad dollars. Economists call the phenomenon "network effects"; business executives just call it momentum. In search, Google has it in spades, and Microsoft, against the odds, wants to reverse it.http://www.nytimes.com/2011/07/31/technology/with-the-bing-search-engine-microsoft-plays-the-underdog.html