The homogeneity assumption, inherent to input–output (IO) analysis, implies that every euro spent within one product group is assigned the same environmental burden. We address this assumption applied to price conversion of household expenditures from purchasers’ to basic prices when the carbon footprint of consumption is calculated for specific household segments by linking the IO table and micro-level household consumption data. We perform a sensitivity analysis of the different allocations of the retail trade margin of two consumption groups (Food and Goods) across household expenditure deciles. While a differently allocated retail trade margin influences the carbon footprint of household segments, it does not challenge the general finding that households with higher expenditures are responsible for higher footprints. This finding holds also for different emission intensities of retail trade margins.

投入产出分析固有的同质性假设意味着在一个产品组中花费的每一欧元都被分配了相同的环境负担。当通过将IO表和微观家庭消费数据相链接来计算特定家庭细分的消费碳足迹时，我们将适用于将家庭支出从购买者价格转换为基本价格的假设。我们对两个消费类别（食品和商品）在家庭支出指标之间的零售贸易利润率的不同分配进行敏感性分析。尽管分配不同的零售贸易利润率会影响家庭细分的碳足迹，但这并没有挑战总的发现，即支出较高的家庭造成的碳足迹更大。