Thus, for those who redeem rewards frequently, the free flights, complimentary hotel stays and fringe benefits (preferred status, VIP access, etc.) outweigh the risk of devaluation and make airline or hotel credit cards hard to beat by any other type of rewards card.

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In clinical outcome studies, one tries to identify all of the components of health status that have been empirically shown to demonstrate an impact on mortality, longevity, etc.

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With buyers, you might look for: age, marital status, number of children, income, automobiles, new to town, how they became customers, etc.

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