SAN JOSE, Calif. – Google co-founder Larry Page will take charge of the company’s day-to-day operations as chief executive officer, replacing current CEO Eric Schmidt, who will focus on strategic projects and, in particular, new products.

“We’ve been talking about how best to simplify our management structure and speed up decision making for a long time,” Schmidt said in a statement released by Google. “clarifying our individual roles, we’ll create clearer responsibility and accountability at the top of the company. In my clear opinion, Larry is ready to lead, and I’m excited about working with both him and Sergey for a long time to come.”

Internally, Schmidt will continue to act as an adviser to Page and Google co-founder Sergey Brin, who will also focus on strategic projects and new products.

“Eric has clearly done an outstanding job leading Google for the last decade,” Page said in a written statement. “The results speak for themselves. There is no other CEO in the world that could have kept such headstrong founders so deeply involved and still run the business so brilliantly. … His advice and efforts will be invaluable to me as I start in this new role. Google still has such incredible opportunity — we are only at the beginning, and I can’t wait to get started.”

The changes begin April 4.

Google on Thursday reported fourth-quarter revenues of $8.44 billion, an increase of 26 percent compared to the fourth quarter of 2009 — topping analysts’ expectations.

Google in 2010 embarked on an ambitious strategic agenda, spending well over $2 billion as it scooped up more than 30 small startups and larger established companies starting in the fall of 2009, and adding 3,500 people to its global workforce. But Google was rebuffed on what would have been its biggest purchase — a reported $6 billion bid for discount broker Groupon.

Investors were unmoved: Google stock underperformed the market in 2010, rising about 9 percent over the past year.

In recent days, however, Google stock has been rising based on speculation that Google ad revenue would benefit from a strong holiday season.