Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

You don't need to have studied economics to be familiar with the law of diminishing marginal utility and the idea of consumer surplus. The first has to do with the benefit consumers get from their ...

It is one of the basic principles taught to students studying economics. Introduced by Lord Alfred Marshall, it forms a crux in the micro-economic level often reflected in routine, day-to-day life.

If you’re shopping for a new dishwasher, you might be thrilled to save a few hundred bucks on a model you like during a big sale. But there’s almost no chance that you would buy the same dishwasher ...

From a practical standpoint, the august professors were talking about the value of that last dollar, the one at the top of a potentially very high stack that you might possess. And the function for ...

Forbes contributors publish independent expert analyses and insights. A former Dallas Fed president, I cover the economy. This is not an argument for more quantitative easing, or QE3, as it would ...

Mit der Begründung der ordinalen Nutzentheorie durch Pareto war der Begriff des Grenznutzens nicht mehr quantitativ interpretierbar. Lediglich die Grenzrate der Substitution erwies sich den jetzt ...