Material Welfare vs. Scarcity

Objectivism vs. Subjectivism

For ordinary purposes economic things can best be described as economic, just as blue things can best be described as blue. But if we must have a second-best description for the benefit of those who doubt whether they know what is meant by the term economic, I think we must fall back on “having to do with the more material side of human happiness,” or more shortly, “having to do with material welfare.”
Cannan (1922 [1914]) Ch.1.

Here, then, is the unity of subject of Economic Science, the forms assumed by human behaviour in disposing of scarce means. … Economics is the science which studies human behaviour as a relationship between ends and scarce means which have alternative uses.
Robbins (1932) p.4.