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Originally Posted by ullmandds
yes...but this "ideal" scenario you outline is not possible to create?
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Not possible to create, that’s true. But to me, better data would be obtained from the time period were card prices/sales were first recorded and preserved. Heck, even data from 5 years back would have much more meaning. The further back the data yields a higher “N” ( i.e. total population in the research sense) which leads to more realistic results.
I’m guessing you’re a dentist, but as you know there’s a reason why medical researchers put more credence in studies that lasted decades rather one that lasted just months ( e.g. Framingham). Stock analysts apply this same concept. And if people are equating cards to stocks then this should hold true as well.