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With rising incomes, the share of expenditures for food products declines. The resulting shift in expenditures affects demand patterns and employment structures. - Ernst Engel With rising incomes, the share of expenditures for food products declines. The resulting shift in expenditures affects demand patterns and employment structures. - Ernst Engel With rising incomes, the share of expenditures for food products declines. The resulting shift in expenditures affects demand patterns and employment structures. - Ernst Engel