In the last days before the crash, the rush to build the railways added a final, lethal factor to the mix.

NEWYORKER: Boss Rail

Here's another, big factor to add to the mix - the facts around inward migration.

BBC: 2011: The Year of Sharp Decreases

With an understanding based only on correlation and not causality, we challenge mix modelers to rationally explain where their long-term factor comes from (whatever value it is) and by what mechanism or how it becomes actual, longer-term consumer purchases.

FORBES: The Downside Of Marketing Mix Models Is There's No Upside For CMOs

Instead, mix models only grossly estimate this value with an externally derived factor of 2X the immediate effect for the longer-term effect.

FORBES: The Downside Of Marketing Mix Models Is There's No Upside For CMOs

Restaurants will supply Wi-Fi as a complimentary service and differentiation factor, says Hagan, while malls and stadiums will be more of a mix.

FORBES: The Next Big Wi-Fi Markets: Malls, Restaurants, Stadiums