Years ago Economics was part of what was called PPE – the triple fields of Politics, Philosophy and Economics. Economics was grouped with the moral sciences.
Nowadays Economics is grouped with MPNE – Mathematics, Psychology, Neuroscience and Economics. Economics is put with the traditional value-free sciences.
There’s nothing wrong with these fields on their own. But, if economics is about what’s good and how to get it, it can’t be value-free. It’s mathematical models are poor metaphors that are obviously and vastly inadequate. Its papers read like Euclid, with axioms and theorems, their faux rigor is inversely proportional to their minimal efficacy.
No model yet invented can tell you whether anything at all will go up or down tomorrow. The invisible worm at the heart of economics has been its dark secret love of inappropriate scientific elegance and scientism.
Markets and prices are generated by human behavior. The greatest conceptual danger in modeling human behavior is idolatry, which is a kind of pragmamorphism, imagining that someone can write down a theory that encapsulates human behavior and relieves you of the difficulty of constant thinking. A model may be entrancing but no matter how hard you try, you will not be able to breath true life into it. To confuse a limited flawed model with a theory is to embrace a future disaster driven by the belief that humans obey mathematical rules. — Emanuel Derman
En hälsosam dos självrannsakan från en av grundarna av “quantitative finance” på 80-talet. Gott om eget tvivel rörande matematiska modellers predikativa förmåga. Och samhällsnytta. I grund och botten handlar våra finansiella marknader om att möjliggöra bra företagsidéer genom värdeeffektiv tillgång till kapital. Läser just nu Nassim Nicholas Talebs bok “Black Swan: The impact of the highly improbable”. Den ger mer stöd till känslan av att det som verkligen spelar roll i världen inte låter sig fångas av en approximativ modell, vilket därmed invaliderar modellernas legitimitet i stort. Därmed inte sagt att fysikaliska modeller är värdelösa, de är bara inte tillämpbara på människor i någon större utsträckning.