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BASAL GANGLIA AND THE NEURO FOUNDATIONS OF KEYNESIAN RIGIDITIES

Making changes represents abandoning the known, but our brain resists the unknown. It interprets a danger to survival, that is the reason why change is not so simple.

The Great Crisis of the 1930s undoubtedly marked a before and after in economic theory. The world went into a very deep crisis, the levels of unemployment and marginalization spread everywhere, and the mechanisms of market adjustment that previously worked, now seemed not to work. At that time reigned in the academic world the theories of classic and neoclassical, as A. Smith, D. Ricardo, A. Marshall, S. Jevons, among others, and very few dared to discuss them.

The neoclassicals always argued full employment for all factors of production, arguing that if the economy was slow to reach its equilibrium, it was because of the existence of unfortunate government interventions or by monopoly powers (also the fault of the state), which prevented the correct functioning of the competition. And while these theories were logically well formulated (given their assumptions), they fell into a certain discredit to explain reality, given the political-institutional rigidities that prevent the rapid adjustments needed by the neoclassical model. It is in this context that it appears on the scene of Keynesian theory, as a new way of thinking about the capitalist economy and government intervention, with its policies of moderation of cycles, fiscal and monetary policies.

But what is the reason for so many rigidities that hinder the free and rapid adjustment of the markets? Why governments do not eliminate them? And even more, why people do not ask politicians for their elimination? From the point of view of Cognitive Neuroscience, the answer is simple: human brain seeks assurances, predictions and rigidities that keep it in neuropsychological equilibrium, that is, the opposite of the rapid change needed by neoclassical models to work properly. In this way, there is nothing better for the human brain than the gradual Keynesian change, at least for the brain at its current stage of development.

Remember our brain has not had time yet to adapt to the rapid and permanent change. Society changed recently. The boom of discoveries and technology that fosters these permanent changes has only recently appeared with force at the end of the 20th century. There has not been time yet for our brain to adapt to so much accelerated change, despite liberal economists opinion.

Basal Ganglia and Aversion to Changes

One of the most important findings for Neuroeconomics has to do with the role played by the basal ganglia and the functioning of memory in the natural human aversion to changes. The basal ganglia are responsible for prioritizing the options that led us to success in the past, instead of exploring new alternatives. This explains why we tend to stay in the comfort zone, repeating old patterns that already had good results in the past.

And while the brain's neuroplasticity (its ability to create new neural connections) allows for the potential to adapt to changes, the human natural tendency is still towards slow changes, or toward "no change". In this way, our political and worker union institutions play in that sense, as a reflection of our natural tendency not to change what is comfortable, endowing the whole cluster of Keynesian and institutionalist rigidities of neuroscientific sustenance.

In summary

Our central nervous system has millenarian structures that reject change. One of them, for example, is the brainstem, where the so-called basal ganglia are. There are the behaviors that we have learned and, one of its characteristics is “neophobia”, that is, fear of the new. This is one of the most powerful fundamentals of Keynesian rigidity and resistance to change.

Therefore, anxiety and stress are the tip of the iceberg of the response of a nervous system (central and peripheral) that is not yet ready for rapid changes. In this way, the pleiad of gradualist institutional rigidities that politicians love (and which liberals hate so much), are those that Keynes understood perfectly a century ago, to generate a new economic vision.


Author: Sebastián Laza (Economist, MBA, Specialist in Applied Cognitive Neuroscience to Organizations)

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