求翻译：This study develops and estimates a model to empirically identify two behavioral effects (namely consumption flexibility and state dependence) that may underlie temporal and horizontal assortment choice, using scanner panel data where consumption information is unavailable. The proposed approach permits a consumer's consumption utility to be dependent on previous consumptions, thus capturing state dependence both across purchase occasions and within horizontal assortments. Moreover, consumers' purchase and consumption decisions are modeled at two distinctive and sequentially related stages, which allows for incorporating the effect of consumption flexibility. The model is estimated on scanner panel data...是什么意思？

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