> What is the critical difference? * Observers are also actors. They can and will significantly influence the observed. * Once observations are revealed at

> What is the critical difference? * Observers are also actors. They can and will significantly influence the observed. * Once observations are revealed at large it'll have short/long term consequences. There's a good reason fed gives multiple indications before changing any parameters such as interest rates, tapering etc., * Humans don't necessarily act like rational selfish agents (as economists expect) all the time. * Economics is often entangled with other aspects such as trade agreements, geopolitics some of which take years and decades to manifest.