Narrative economics…
… is the study of network power law effects…
… caused by clusters and the links between them…
… which can under certain conditions drive virality…
… the tipping points of which may seem random…
… but are governed by network rules, which are dynamic.
This isn’t random, just easier to explain after the fact, often when the narrative is proven false, which is called a bubble.
Financial bubbles are idea bubbles, financial markets are social networks.
Speculative Fiction 