Concerns about rising energy prices tend to occur in times of economic expansion, to disappear in times of recession. A recurring fear is that, in the long run, real energy prices will trend upwards. This paper presents evidence from five hundred years of prices of energy sources for the United...

Quantitative problems frequently arise in production systems which cannot be solved by the standard Operational Research techniques. In such cases, a simple mathematical model can sometimes be built which simulates the real problem and enables a manager to find out what would be the effect of...