But, as the Facebook games model has begun to strain, and as the popularity of smartphone gaming has risen, Zynga has had to re-invent itself.
Another challenge: the average age of Buick buyers is 67; only the recent addition of truck-based models has begun to attract younger buyers.
Recently, the state model has begun to ship water in the struggle to keep class sizes down and achieve increasingly onerous targets in numeracy and literacy skills.
The forecast model has begun to show rather optimistic numbers for Mr. Obama, but that also means the standards will be higher for him to maintain.
Chrysler, propelled by an array of new models, has begun to show profits after suffering heavy losses last year -- Mr. Zetsche's fortunes are likely to rise along with it.
Privately owned by a consortium of old-school TV players including 21st Century Fox, NBCUniversal and Disney, Hulu's ad-supported business model has begun to look increasingly attractive to TV and movie producers as an increasing number of TV viewers cut the cord on cable subscriptions.
Lately, the hacker school model has begun to take its first steps away from subject matter and curricula that's exclusively focused programming and CS.
First, as the development of forest ecosystem process-based models has begun only recently, research efforts have focused on theoretical development to improve realism rather than reducing the amplitude of variation of the predictions.
Today this direct-to-consumer model has begun to disrupt the apparel and jewelry verticals, but expect to see more online-only brands emerge in other markets over the coming years.
