Suppose foreign exchange markets anticipate a devaluation for country a. further assume that policy makers in country a continue to fix its nominal exchange rate. in order to maintain the peg of the currency at its original level, which of the following must occur? a. increase the domestic interest rate. b. increase the domestic price level. c. convince trading partners to raise their interest rates. d. convince trading partners to raise their taxes. e. decrease the domestic interest rate.

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?