A Quote by Ha-Joon Chang

Contrary to what professional economists will typically tell you, economics is not a science. All economic theories have underlying political and ethical assumptions, which make it impossible to prove them right or wrong in the way we can with theories in physics or chemistry.
People want to think of economics as a natural science, like physics, with the comforting reliability of simple-to-understand theories like F=MA. Unfortunately, it isn't. Economics is a social science, and the so-called theories are really social and moral constructs.
Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists founded chemistry by pursuing chimerical problems and theories which are false. In physical science, which is more advanced than biology, we might still cite men of science who make great discoveries by relying on false theories.
It is ... a sign of the times-though our brothers of physics and chemistry may smile to hear me say so-that biology is now a science in which theories can be devised: theories which lead to predictions and predictions which sometimes turn out to be correct. These facts confirm me in a belief I hold most passionately-that biology is the heir of all the sciences.
There are 15 main theories in physics, and we know all of them. If there weren't a finite number of theories, there would not be a point to physics.
Newton's theory is not 'not right', it just does not cover all distances. Contrary to popular belief, theories in science are not proven wrong, they are just replaced by more complete and convenient theories. To sound provocative, even the geocentric theory was never "proven" wrong, it is just not as convenient as the heliocentric theory, since it requires endless epicycles.
Because those who hold conspiracy theories typically suffer from a crippled epistemology, in accordance with which it is rational to hold such theories, the best response consists in cognitive infiltration of extremist groups. Various policy dilemmas, such as the question whether it is better for government to rebut conspiracy theories or to ignore them, are explored in this light.
History has got a lot to do with unique circumstances under certain particular cases and grand theories will always find counter cases. I don't think that people whose expertise lies in one thing should try to make grand theories about something (a) where it's very hard to get the evidence to prove that you're right and (b) where it's much too easy to make up stories that seem right.
Managers are already voracious consumers of theory. Every time they make a decision or take action, it's based on some theory that leads them to believe that action will lead to the right result. The problem is, most managers aren't aware of the theories they're using, and they often use the wrong theories for the situation.
Free market economists frequently see minimum wage legislation as mere political intervention. However, there are decent economic theories which show that, under certain circumstances, minimum wages can be beneficial, as it makes workers more productive.
One of the ways of stopping science would be only to do experiments in the region where you know the law. But experimenters search most diligently, and with the greatest effort, in exactly those places where it seems most likely that we can prove our theories wrong. In other words, we are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress.
The caricature of science is that we hold tight to the theories we have, and shun challenges to them. That's just not true. In fact, we hold our highest rewards for those scientists who can prove others wrong. And by the way, they are famous in their own lifetimes. We don't wait until they're dead.
Everybody thinks of economics whether he is aware of it or not. In joining a political party or in casting his ballot, the citizen implicitly takes a stand upon essential economic theories.
There will be well-testable theories, hardly testable theories, and non-testable theories. Those which are non-testable are of no interest to empirical scientists. They may be described as metaphysical.
Our minds are specifically adapted to developing certain theories, and we have a science if the theories that are available to our minds happen to be close to true. Well, there is no particular reason to suppose that the intersection of true theories and theories that are accessible to the mind is very large. It may not be very large.
I write with two things in mind. I want to be right with my fellow economists. After all, I've made my life as a professional economist, so I'm careful that my economics is as it should be. But I have long felt that there's no economic proposition that can't be stated in clear, accessible language. So I try to be right with my fellow economists, but I try to have an audience of any interested, intelligent person.
You make observations, write theories to fit them, try experiments to disprove the theories and, if you can't, you've got something.
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