NBER paper probes whether staying employed actually slows cognitive decline

A new NBER working paper examines a long-standing question in labor and aging economics: does continued employment preserve cognitive function in older workers, or do healthier workers simply stay employed longer? The authors lean on labor market shocks as natural experiments to break that endogeneity, isolating cases where job loss or continued work was driven by external conditions rather than individual capability.

The framing matters because policy debates around retirement age, pension reform, and workforce participation often invoke the ‘use it or lose it’ hypothesis without rigorous causal evidence. If employment genuinely slows decline, raising retirement ages carries a cognitive-health upside; if the relationship is selection, those policies lose one of their justifications.

The abstract-level signal here is methodological as much as substantive — shock-based identification is the credible path through a literature crowded with correlational claims. Readers should treat any headline number as conditional on the specific shocks studied and the populations they affected.