At the beginning of 2023, differences between consumption structures continued to have a significant effect on inflation differentials according to household category (the youngest households compared to the oldest, those living in small municipalities compared to those in large conurbations, the least well-off compared to the most affluent). These differentials, which can be as much as 3 percentage points, are mainly due to energy, especially housing energy, and food. There are also considerable differences within the household categories themselves, with an interquartile differential of 2 to 4 inflation points. However, inflation for the youngest households seems to be relatively uniform compared to that of older households. Finally, it should be noted that inflation differentials only provide information on some of the possible purchasing power differentials, which also depend on changes in income...