Robert Giffen
Robert Giffen (1837 - 1910) is an Irish economist.
Its studies made it possible to highlight a new type of good to which it gave its name: the Well Giffen.
He discovered this type of good by studying the Irish behavior following a rise of the Prix of the potatoes. He noted that the Purchasing power of people decreased at the same time as the price of potatoes increased. That affected their consumption: he consumed less other types of goods but more potatoes because that remained the good all the same the least expensive.
A Bien Giffen is thus one although one consumes more when its price increases.
See too
Elasticity of the request
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