Saturday, June 4, 2016

Height and IQ in Indonesia

Interesting. Height and Cognition at Work: Labor Market Productivity in a Low Income Setting by Daniel LaFave and Duncan Thomas. From the abstract.
Taller workers earn more, particularly in lower income settings. It has been argued that adult height is a marker of strength which is rewarded in the labor market, a proxy for cognitive performance or other dimensions of human capital such as school quality, a proxy for health status or a proxy for family background characteristics. As a result, the argument goes, height is rewarded in the labor market because it is an informative signal of worker quality to an employer. It has also been argued that the height premium in the labor market is driven by occupational and sectoral choice. This paper evaluates the relative importance of these mechanisms that potentially underly the link between adult stature and labor market productivity. Drawing on twelve waves of longitudinal survey data collected in rural Central Java, Indonesia, we establish that height predicts hourly earnings after controlling education, multiple indicators of cognitive performance and physical health status, measures of family background, and sectoral and occupational choice. The height premium is large and significant in both the wage and self-empoyed sectors indicating height is not only a signal of worker quality. Since adult stature is largely determined in the first few years of life, we conclude that exposures during this critical period have an enduring impact on labor market productivity.
There is an associated graph that reinforces the point.

When I was at grad school for my MBA (Wharton), I was probably surrounded by the highest concentration of very smart and accomplished people in my lifetime. It was a topic of discussion way back then, that it was also notable how tall that population was.

Over my thirty odd year career, I have had later occasions to observe the same correlation between height and IQ among consulting firm and law firm partners, C-level executives, etc.

With any human system, there are all sorts of complicating variables. I know that general childhood health is also highly correlated with both height and IQ so there is that co-variable to sort out.

Anyway, just interesting to see the same phenomenon being reported in other countries/cultures with different populations and circumstances.

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