Juan has preferences that satisfy more is better on bundles of two goods (x, y). In some market situation Juan spends 2/3 of his income in good x. When the price of good x drops by 50%, all the other constant, Juan spends more than 2/3 of his income in good y. We can infer that good x is a Giffen good for Juan.
No.

Yes.

account balance book uk

1) the stages a new product goes through from beginning to end, i.e., the stages that a product passes through from introduction through growth, maturity, and decline. 2) the time from initial research and development to the time at which sales and support of the product to customers are withdrawn. 3) the period of time during which a product can be produced and marketed profitably.

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