People having too much so they don't buy any more<span />
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<span><em></em>These industries are crucial to the local economy and are called the economic base of the region. This material covers the economic base model of a region and the methodology of regional income and employment multipliers.
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The great ancient civilizations flourished around river valleys because the rivers produce rich fertile soil and a supply of water for irrigation of crops and human consumption. This allows for the agricultural production to be greater and it can sustain more people.
Austrian Empire controlled the city of Venice before the Unification of Italy.