Blood Money: Selling Plasma to Avoid High-Interest Loans.

Little is known about the motivations and outcomes of sellers in remunerated markets for human materials. We exploit dramatic growth in the U.S. blood plasma industry to shed light on the sellers of plasma. Sellers tend to be young and liquidity-constrained with low incomes and limited access to traditional credit. Plasma centers absorb demand for nontraditional credit. After a plasma center opens nearby, demand for payday loans falls by over 13% among young borrowers. Meanwhile, foot traffic increases by over 4% at nearby stores, suggesting that constrained households use plasma markets to smooth consumption without appealing to high-cost debt. [ABSTRACT FROM AUTHOR]

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