That isn't a business model -- it's an equation for failure.

FORBES: World Weary Web

Unfortunately what they didn't do was dot the "i's" and cross the "t's" when creating and using the Department for Transport's complicated economic model for assessing franchise bids - which meant that in a judicial review of the Department's decision to go with First Group, launched by Virgin, the current holder of the franchise, the government was bound to lose.

BBC: Cameron: No more dotting of 'i��s'

Putin's role model isn't Stalin but Peter the Great (1672--1725), whose portrait hangs in his office.

FORBES: Energy Tsar

If even Amazon isn't a shoo-in for success, Internet startups that try to follow Bezos's model may be in trouble.

FORBES: Does Amazon.com really matter?

The exclusion of one Orthodox Jewish enclave isn't likely to undermine the city's bike-share system, which is based on a model that has proved successful in cities like Washington, D.

WSJ: Bike-Share Rides Past Neighborhood

But as a dossier of evidence on nuclear black markets published this week by the London-based International Institute for Strategic Studies points out, Mr Khan's business model wasn't unique.

ECONOMIST: The nuclear black market

As for Japan, KMV's model says that 3 of Japan's 19 largest banks -- it won't name names -- have at least a 2% chance of defaulting on their debt over the next year if the government lets market forces take their course.

FORBES: Default-risk bookies