A. is used by the government to maintain stable supply of goods. b. is the voluntary exchange system. c. is used only in countries that are developing. d. is old fashioned and is no longer used.

Google started as one of many internet search engines, amazon started as an online book seller, and ebay began as a site where people could sell used personal items in auctions. these firms have grown to be so large and dominant that they are facing antitrust scrutiny from competition regulators in the us and elsewhere. did these online giants grow by fairly beating competition, or did they use unfair advantages? are there any clouds on the horizon for these firms -- could they face diseconomies of scale or diseconomies of scope as they continue to grow? if so, what factors may limit their continued growth?

Adecision is made at the margin when each alternative considers

When gathering information about certain occupations, be sure to understand how you are paid. what is the difference between a salary and an hourly wage?