JP Bouchaud
https://en.wikipedia.org/wiki/Jean-Philippe_Bouchaud
2009 The (unfortunate) complexity of the economy
https://www.res.org.uk/resources-page/radical-complexity.html
- Parisi 2002 Complex Systems: a Physicist’s Viewpoint
A complex system is a system that must be described in terms of probabilities, like all chaotic systems, but is such that the probabilities themselves depend sensitively on the details of the system. In other words, probabilities themselves must be described in terms of probabilities!