Comparative advantage explains how two nations can benefit from trade

If a scale economy is the dominant technological factor defining or establishing comparative advantage, then the underlying facts explaining why a particular country dominates world markets in some product may be pure chance, or historical accident

Explain, and compare this with the answer you would give for the Heckscher-Ohlin model of comparative advantage.

Which of the following is not a tax-deferred saving method?

a. IRAs b. Keogh plans c. 403(b) plans d. Kemp IRA