"In general then, and contrary to Friedman, abandoning a factually false heuristic asumption will normally lead to a better theory — not a worse one."

“If financial markets aren't efficient, then what are they? According to the 'fractal market hypothesis', they are highly unstable dynamic systems that generate stock prices which appear random, but behind which lie deterministic patterns.”

“There are numerous theorems in economics that rely upon mathematically fallacious propositions.”

“If a 19th century capitalist Machiavelli had wished to cripple the socialist intelligentsia of the 20th century, he could have invented no more cogent weapon than the labour theory of value. Yet this theory was the invention, not of a defender of capitalism, but of its greatest critic: Karl Marx.”

“Why do economists persist in modelling the economy with static tools when dynamic ones exist; why do they treat as stationery an entity which is forever changing?”

“Not even an economist can make time stand still .”

“Since in reality the stock market is inhabited by mere mortals, there is no way that the stock market can be efficient in the way that economists define the term.”