They occur in economics with the behaviour of prices and as Poincaré had suspected but never proved in the behaviour of the Bourse or our own Stock exchange in London.
Sila ay nagaganap sa ekonomiya sa pag-uugali ng mga presyo at bilang Poincaré had hinihinalang ngunit hindi kailanman proved sa pag-uugali ng Bourse o sa aming sariling Stock exchange sa London.