Robert Summers and Alan Heston published data for 130 countries that used purchasing power parity, rather than market exchange rates, to compare GDP across countries. As a result, measured per capita incomes of developing countries rose relative to per capita incomes in developed countries. This is most likely because:

Apopular low-cost airline, parson corp., has gone out of business. although the service and price provided by the airline was what customers wanted, the larger airlines were able to drive the low-cost airline out of business through an aggressive price war. which component of the competitive environment does this illustrate? a) threat of new entrants b)competitors c) economic factors d) customers d) regulators