Inflation Bites Differently: Household Consumption, Welfare, and Poverty during the 2022 European Energy Crisis
By applying a non-homothetic CES demand system to microdata from Spain and Italy during the 2022 energy crisis, this paper demonstrates that heterogeneous consumption patterns cause poorer households to suffer disproportionately larger welfare losses and that relying on a single representative price index significantly obscures the true distributional impact of inflation on poverty.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Inflation is often spoken of as a single number, a headline figure that tells us how much more expensive life has become for everyone. But this average hides a deeper reality: the cost of living does not rise uniformly. Just as a sudden storm might flood a valley while leaving a hilltop dry, a surge in the price of essential goods hits different families with vastly different force. This uneven impact depends entirely on what a household actually buys. If a family spends a large portion of its budget on energy, a spike in electricity or gas prices will erode their purchasing power far more quickly than it will for a family that spends most of its money on other things. Economists have long understood that spending habits change as income changes; poorer families tend to spend a larger share of their income on necessities like food and heat, while wealthier families spend more on luxury items. This paper explores how these spending patterns, combined with the specific nature of the 2022 European energy crisis, created a hidden layer of inequality that standard statistics missed.
The researchers behind this study, based at the University of Genoa, set out to measure exactly how the 2022 energy crisis, which saw Russian gas supplies disrupted and prices soar across Europe, affected individual families in Spain and Italy. They focused on these two nations because, while they faced the same global shock, their experiences were strikingly different. Italy, heavily dependent on Russian gas and with a power grid that burned more gas to generate electricity, saw household energy prices jump by more than 85 percent between 2021 and 2022. Spain, with a more diverse energy mix and a unique policy that capped gas prices for electricity generation, saw a much smaller rise of about 31 percent. The team used detailed records of what thousands of households actually bought to build a picture of how these price hikes translated into real suffering, moving beyond simple averages to see the specific toll on the poorest families.
The study reveals that the crisis created a regressive form of inflation, meaning it hurt the poor much more than the rich. In Italy, the poorest families faced an inflation rate of nearly 10 percent, while the richest faced only about 6 percent. In Spain, the gap was smaller but still present, with the poorest seeing prices rise by 8 percent compared to 7 percent for the richest. However, the true story lies not just in the price increases, but in how those increases damaged the families' overall well-being. The researchers found that the pain of inflation is not just about how much prices go up, but about how sensitive a family is to losing their spending power. Poorer families, who spend a larger share of their money on necessities, are more fragile; when prices rise, they are forced to cut back on essential items, which causes a deeper drop in their quality of life than the same price rise would cause for a wealthier family.
This sensitivity meant that the welfare losses in Italy were not only larger in magnitude but also more unequal than the inflation rates themselves. The poorest Italian families suffered a drop in well-being that was more than twice as severe as that of the richest families. Even more surprisingly, the study suggests that Italian families are inherently more vulnerable to these shocks than Spanish families, regardless of the specific price numbers. This is because the spending habits of Italian families, particularly the poor, are structured in a way that makes them more sensitive to price changes. Even if an Italian family and a Spanish family faced the exact same rise in prices, the Italian family would likely feel a greater loss in their standard of living because of how they allocate their budget.
The researchers also looked at how these hidden inequalities affected poverty counts. They used a fixed poverty line, representing the amount of money needed to maintain a basic standard of living before the crisis. In Spain, this approach revealed a stark reality: while official statistics might have shown a modest rise in poverty, the true number of people falling below the poverty line was much higher. Because the poor in Spain faced higher inflation than the average, a standard measure that applies the same price increase to everyone failed to catch them. The study estimates that using a common price index missed about 1.6 million newly poor people in Spain. In Italy, the situation was different; the energy shock was so severe that even a standard measure would have shown a massive rise in poverty. The hidden inequality in Italy was less about missing people from the count and more about the sheer depth of the crisis pushing everyone down.
Ultimately, the paper argues that relying on a single, average price index to understand the impact of inflation is dangerous. It conceals the fact that the poor are paying a much higher price for the same basket of goods. The researchers show that the same spending patterns that define a family's daily life also determine how much they suffer when prices change. By looking at the specific details of what families buy, rather than just the average price, we can see the true distributional cost of economic shocks. The findings suggest that to truly understand poverty and welfare during times of crisis, we must stop treating all households as if they are the same and start measuring the cost of living as it is actually experienced by each family.
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