We construct panel price indexes using retail scanner data that allow comparisons of consumption cost across space and time. Two types of panel indexes are examined: the rolling-window panel extensions of the multilateral Cave-Christensen-Diewert (CCD) index with the Törnqvist index as its elements, and of the multilateral Gini-Eltetö-Köves-Szulc (GEKS) index using the Fisher ideal index as its elements. The rolling window method maintains the nonrevisability of published index numbers while it allows index numbers for new periods and locations be calculated and the basket of items be updated. Meanwhile, the multilateral structure of price comparison eliminates significant downward drift in standard chained indexes. Using county-level bilateral and panel indexes based on retail beverage scanner data, we experimentally adjust for purchasing parity the portion of Supplemental Nutrition Assistance Program (SNAP) benefits that participants spend on beverages. Accounting for temporal and spatial cost differences causes over 2% of SNAP allotment spent on beverages be reallocated, or approximately a 5% change in allotment on average for a county. About 90% of the relocated SNAP fund is to adjust for spatial differences in food cost. We also compare SNAP allotments implied by the retail scanner data indexes with those implied by indexes based on the USDA Quarterly Food-at-Home Price Database (QFAHPD). The treatment of unit values and product quality may have contributed to the significant differences observed between the retail scanner data indexes and the QFAHPD indexes.

中文翻译：

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基于扫描仪数据的面板价格指数

我们使用零售扫描仪数据构建面板价格指数，允许跨空间和时间比较消费成本。研究了两种类型的面板指数：以 Törnqvist 指数为元素的多边 Cave-Christensen-Diewert (CCD) 指数的滚动窗口面板扩展，以及使用 Törnqvist 指数的多边 Gini-Eltetö-Köves-Szulc (GEKS) 指数的滚动窗口面板扩展Fisher 理想指数作为其元素。滚动窗口方法保持已发布索引号的不可修改性，同时允许计算新时期和位置的索引号并更新项目篮子。同时，价格比较的多边结构消除了标准链式指数的显着下降。使用基于零售饮料扫描仪数据的县级双边和面板指数，我们实验性地调整了参与者在饮料上花费的补充营养援助计划 (SNAP) 福利部分的购买平价。考虑到时间和空间成本差异，导致超过 2% 的 SNAP 分配用于饮料被重新分配，或者平均一个县的分配变化大约为 5%。大约 90% 的重新安置的 SNAP 基金用于调整食品成本的空间差异。我们还将零售扫描仪数据指数所暗示的 SNAP 分配与基于美国农业部家庭食品季度价格数据库 (QFAHPD) 的指数所暗示的分配进行了比较。单位值和产品质量的处理可能导致零售扫描仪数据索引和 QFAHPD 索引之间观察到的显着差异。