Study in China finds that retirement may accelerate cognitive decline, even for those with stable income

People who retire early suffer from accelerated cognitive decline and may even encounter early onset of dementia, according to a new economic study (Note: opens PDF) I conducted with my doctoral student Alan Adelman.

To establish that finding, we examined the effects of a rural pension program China introduced in 2009 that provided people who participated with a stable income if they stopped working after the official retirement age of 60. We found that people who participated in the program and retired within one or two years experienced a cognitive decline equivalent to a drop in general intelligence of 1.7% relative to the general population. This drop is equivalent to about three IQ points and could make it harder for someone to adhere to a medication schedule or conduct financial planning. The largest negative effect was in what is called “delayed recall,” which measures a person’s ability to remember something mentioned several minutes ago. Neurological research links problems in this area to an early onset of dementia.

Cognitive decline refers to when a person has trouble remembering, learning new things, concentrating or making decisions that affect their everyday life. Although some cognitive decline appears to be an inevitable byproduct of aging, faster decline can have profound adverse consequences on one’s life.

Better understanding of the causes of this has powerful financial consequences. Cognitive skills – the mental processes of gathering and processing information to solve problems, adapt to situations and learn from experiences – are crucial for decision-making. They influence an individual’s ability to process information and are connected to higher earnings and a better quality of life.

Retiring early and working less or not at all can generate large benefits, such as reduced stress, better diets and more sleep. But as we found, it also has unintended adverse effects, like fewer social activities and less time spent challenging the mind, that far outweighed the positives.

While retirement schemes like the 401(k) and similar programs in other countries are typically introduced to ensure the welfare of aging adults, our research suggests they need to be designed carefully to avoid unintended and significant adverse consequences. When people consider retirement, they should weigh the benefits with the significant downsides of a sudden lack of mental activity. A good way to ameliorate these effects is to stay engaged in social activities and continue to use your brains in the same way you did when you were working.

In short, we show that if you rest, you rust.

Because we are using data and a program in China, the mechanisms of how retirement induces cognitive decline could be context-specific and may not necessarily apply to people in other countries. For example, cultural differences or other policies that can provide support to individuals in old age can buffer some of the negative effects that we see in rural China due to the increase in social isolation and reduced mental activities.

Therefore, we can not definitively say that the findings will extrapolate to other countries. We are looking for data from other countries’ retirement programs, such as India’s, to see if the effects are similar or how they are different.

– Plamen Nikolov is Assistant Professor in the Department of Economics at The State University of New York (at Binghamton). A big focus of the economics research lab he runs is to better understand the causes and consequences of changes in what economists call “human capital” – especially cognitive skills – in the context of developing countries. One of the main ways they do this is through the use of randomized controlled trials to measure the impact of a particular intervention, such as retiring early or access to microcredit, on education outcomes, productivity and health decisions. This article was originally published on The Conversation.

The Study:

Pension Benefits, Early Retirement and Human Capital Depreciation in Late Adulthood (Papers, arXiv.org)

  • Abstract: Historically, economists have mainly focused on human capital accumulation and considerably less so on the causes and consequences of human capital depreciation in late adulthood. Studying human capital depreciation over the life cycle has powerful economic consequences for decision-making in old age. Using data from the introduction of a retirement program in China, we examine how the introduction of a retirement program influences individual
    cognition. We find large negative effects of pension benefits on cognitive functioning among the elderly. We detect the most substantial impact of the program to be on delayed recall, which is a significant predictor of the onset of dementia. We show suggestive evidence that the program leads to larger negative impacts among women. We show that retirement plays a significant role in explaining cognitive decline at older ages.

The Study in Context:

  • What are cognitive abilities, and how to boost them?
  • To Harness Neuroplasticity, Start with Enthusiasm
  • Solving the Brain Fitness Puzzle Is the Key to Self-Empowered Aging
  • Want to train your brain? Work as a physician, air traffic controller, financial analyst (or similar)

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