Question

What are some real-world examples of industries where economies of scale are extensive and equilibrium are met?

Answer 1

Stock exchanges aim to provide scale and stable prices for traded assets and the trades themselves.

Also resin (plastic) refineries provide economies of scale with equilibrium.

Explanation:

The stock exchange, and exchanges, in general, aim to provide liquidity (i.e. scale) and establish fair and stable prices for both assets being traded and the costs of trades.

Plastic resin plants require heave up front investments and provide economies of scale with equilibrium pricing when operational. For refineries, the economies of scale are extensive because the refining process provides the required energy at a reasonable cost. Limitations on plant production are mostly a function of demand - uses of, and other plants tooled for the use of the resin in question.