The final dip into the Decision Book is a chance to note how thinking of the past has been gently challenged by the experiences of the present.
The old 80/20 model set out by Vilfredo Pareto at the start of the last century had not only become established thinking but a model that was so widely accepted that the idea the 80% might have some value to rival the 20% something that seemed highly unlikely.
But back in 2004 the editor of Wired Chris Anderson came up with the Long Tail model. Using the internet the point of the model was that the 80% of goods beyond the core 20% will eventually be sold and have more value than the core goods.
The long tail has now become something to drop into conversations as a justification for backing what might have seemed like risky bets in the past. The problem is that in that 80% there are surely degrees of quality and right at the end of the tail it must be a fairly lonely old time.
A review will follow later this week...