In the struggle to define a new model of capitalism, the biggest test for the union movement may be which side to take on globalisation.

ECONOMIST: Unions

The startup is often slammed for its struggle to adopt a serious business model.

FORBES: Don't Buy Into Reports The FTC Is Investigating Twitter

After eight years of struggle, the so-called Standard Model of particle physics was revised (by Makoto Kobayashi and Toshihide Maskawa, of Nagoya University), to accommodate the asymmetry.

ECONOMIST: What��s the matter?

In Britain the model has been hampered by the struggle to secure charitable status, which comes with tax and reputational benefits.

ECONOMIST: Philanthro-journalism

Despite expectations for a flagship new model, codenamed M7, this year, analysts said HTC could struggle to catch its rivals.

BBC: HTC profits slump 90% on strong competition

And while major publishers struggle with bloated release schedules and rampant costs in a shifting media landscape, NYRB Classics succeeds as a lean model of consistency, quality and reader engagement.

FORBES: A Meaningful Publisher