Many of them, for instance, were too dependent on high-tech exports, especially to America.

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Economies dependent on tourism -- for instance, Macau, the "Las Vegas of Asia, " -- would be especially hard-hit.

CNN: Pandemic equals economic pain

Most successful small businesses face a problem when they need to grow because they are overly dependent on one finite resource - for instance, the time and expertise of the lone baker who starts her own business.

BBC: American Giant: The problems of being an overnight success