Economic crossword puzzle

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Across
  1. 3. concentrating goods and services where they have an atavanage
  2. 4. provide a good/service in greater quantity for same financial cost
  3. 7. a type of trade bloc where members have completely free trade internally
  4. 8. association of the south east Asian nations
Down
  1. 1. produce a particular good or service at a lower opportunity cost than its trading partners
  2. 2. refers to a group of countries that join together to reduce the trade barriers
  3. 5. North american free trade agreement
  4. 6. can lead to an economy gaining a competitive advantage