... aswhether value is governed bydemand or supply.’Alfred Marshall, Victorian economist50 economics ideas you really need to know Edmund Conway The price is right? Prices are the signal that tell uswhether ... time you ve read most of the ideas you will be able to think that little bit morelike an economist: to ask probing questions aboutwhy we act the way we do; to reject theconventional wisdom; to ... encompasses history,politics, psychology and, yes, the odd equation ortwo. If it is history’s job to tell us what mistakeswe’ve made over the past, it is up to economics to work out how to do things...