Greed and hubris could prove a factor in the elite league adoption of any play-off system, with the rich always seeking to get richer.
This may have proved a factor in its decision-making as Mr Bernanke said last month that all of the changes would "pose a substantial threat to the recovery".
Age also proved a factor in racial mixing as well, decreasing in older populations.
Rodriguez, Baez, Coulombe, Liberatore and Garcia all have options left, so if it gets too close to call, that could likely prove a factor.
The increased presence of humans in the water proved a factor in the attacks: "As the worldwide human population continues to rise year after year, so does ... interest in aquatic recreation.
These extreme physical conditions are proving a limiting factor in application of the conventional silica-based optical sensors.
The first half was a huge disappointment, with Huddersfield's shackling of Blues playmaker Andy Shinnie - a player transformed in recent weeks - proving a key factor.
Adjustability proved a huge factor".
That, in the end, could prove a saving factor for the future of journalism".
If employees perceive the benefits of a pension will only last for a small number of years, the cost may prove a demotivating factor.
