"Eco-"- "Study of the House". "Management of the House".

An irony is that "Eco - logy" and "Eco - nomics", activities which have come to seem in some ways diammetrically opposed, both etymologically share the same Greek root - "ECO"-"oikos".

They are certainly comprised of very different subject matter when one studies them!.......

Both come from a word meaning "house" - Greek - oikos, "house".
....

One means
"Study of the House" (Ecology)
the other means
"Rules (or customs) of the House" (Economics).
.........

Interestingly enough this makes a rather (poetic) good point -

Studying the house can only really be objective.

Whereas giving rules to the house - or managing the house - cannot really be objective and is really only determined by humans and moreover rules of the house are always........... politics - surely!
Managing the house is an activity as well.....

Economics is politics.

..................

Ecco qua!