A new academic study suggests that secondhand fashion is not replacing fast fashion but sitting alongside it, creating a self-reinforcing loop of overconsumption that retailers can no longer ignore. For brands, this raises hard questions about how “circular” resale programs are designed, marketed, and measured.
What the new study actually found
Researchers from Yale University and Bar Ilan University analysed a nationally representative sample of 1,009 U.S. adults and found a strong positive link between money spent on secondhand clothes and money spent on new clothes. In other words, the heaviest resale shoppers were also heavy fast-fashion shoppers, rather than replacing new buys with pre-loved pieces.
More than 69% of respondents said they had bought secondhand at least once, and a cluster of 59% reported high consumption in both primary and resale markets, with frequent returns and short garment lifespans. Younger consumers stood out: 79% of those aged 18 to…
24 purchased secondhand clothing compared with 57% of those 65 and older, and 84% of students reported buying secondhand. Resale, rebound and “moral license” The study links this pattern to the rebound effect: because resale feels cheaper and “greener,” consumers buy more overall and churn through wardrobes faster.
Buying used can also create a kind of moral licence, where shoppers feel entitled to pick up extra new pieces because they already did something that feels sustainable. Researchers said this dynamic means secondary markets often complement, rather than displace, fast fashion production.
Instead of shrinking fashion’s footprint, booming resale can keep high-volume models intact by offering shoppers a low-guilt outlet for constant trend cycling. Fast fashion’s footprint keeps growing That matters because fast fashion’s environmental cost is already huge: the sector is estimated to account for between 2% and 8% of global greenhouse gas emissions, driven by rapid production cycles and rising clothing consumption.
Over the past 20 years, fast fashion has nearly doubled global garment production and driven an estimated 400% increase in clothing consumption, generating…
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