He thinks Ms Mayer will try hard to keep the talented Mr Levinsohn on board.
ECONOMIST: Marissa Mayer takes on one of the toughest jobs in tech
Ms Mayer used to work at Google, where she oversaw its search, Gmail and mapping businesses.
"She has the same ideas about immigration as her father, " said Ms Mayer.
Ms Mayer has been focusing on building better mobile and social networking services.
Ms Mayer said Yahoo would now work with Tumblr to create ads that "are seamless and enhance the user experience".
"We've actually predicting what query you are likely to do and we're giving you results for that, " said Ms Mayer.
At Google Ms Mayer had a reputation for prickliness, but also for nurturing talent and helping staff to cope with heavy workloads.
ECONOMIST: Marissa Mayer takes on one of the toughest jobs in tech
Although Ms Mayer ran a sizeable team at Google, she has never had to turn round an ailing corporate juggernaut with 700m users.
ECONOMIST: Marissa Mayer takes on one of the toughest jobs in tech
By minimising the gender gap among its working-class base, the National Front could claim the support of over 20% of the overall electorate, according to Ms Mayer.
Ms Mayer found that although doubling the income of poor families would lift most children above the poverty line, it would have virtually no effect on their test scores and only a slight effect on social behaviour.
Second, Ms Mayer must show how Yahoo!
ECONOMIST: Marissa Mayer takes on one of the toughest jobs in tech
First, Ms Mayer notes that the extra money tends to be spent on such things as restaurant meals, clothes, dishwashers, roomier houses or second cars, none of which matters much in helping children succeed in school or life.
ECONOMIST: Marissa Mayer takes on one of the toughest jobs in tech
"Part of our strategy here is to let Tumblr be Tumblr, " Ms. Mayer said.
The deal is at least the sixth startup acquisition since Ms. Mayer became Yahoo's CEO last year.
Trustees now include Zachary Bogue, a tech investor married to Yahoo's Ms. Mayer, an SFMOMA board member.
Acquisitions, however, have long been expected to be part of Ms. Mayer's strategy.
Ms. MAYER: Oh, I think there are a few things that were happening.
This signals to me that Ms. Mayer understands that her workforce is a large asset and also a liability.
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Ms. Mayer, a Google vice president, typically crams 60 meetings into her workweek.
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Ms. Mayer, 37 years old, joined Yahoo as CEO on Tuesday after a 13-year career at rival Google Inc.
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Ms. MAYER: Well, overall, the global searches, you'll see a lot of different influences from the other countries, other languages.
If the deal materializes, it would be Ms. Mayer's first major acquisition since taking over the Internet pioneer last year.
Ms. Mayer earlier this month met with major U.S. ad agencies to speak about her priorities for improving the company.
Ms. Mayer credited the company for its already rich base of big-brand advertisers, which include all of the major film studios.
Ms. MAYER: Well, I think that says a lot of just how broad the demographics are of people who use Google.
"You only do an acquisition of this size and scale if you find an exceptional company, which Tumblr is, " Ms. Mayer said Monday.
Ms. Mayer has made a number of moves to expand Yahoo's presence on mobile devices, freshen up its sites and boost its revenue.
Some Tumblr users will take time to migrate to Yahoo's core websites and might never join the fold of its parent, Ms. Mayer said.
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