Positive feedback loop, specifically. Tesauro noted power-law times in BP learning and you can go off and look at highly skew distributions in BP weight assignm

Positive feedback loop, specifically. Tesauro noted power-law times in BP learning and you can go off and look at highly skew distributions in BP weight assignments on your own. Simon had a little program of research on skew distributions in economics (you cannot throw a stone but you hit one: money, firm size, investments, trades, income, GDP, yadda yadda), and how they are best explained by positive feedback loops.