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Totalitarianism-Crushes-Pollution-in-China (1)

Prof Zhang, Economist, Peking University says, regarding the results in his paper about the effects of pollution:

We are also puzzled by the difference in math and verbal tests as well as the gender difference.

Prof. Chew of National University of Singapore found similar results for college students, greater impact on male than on female students. He gave a talk last year at Peking University. However, in the later public version, his paper mainly emphasizes the impact on decision making. Perhaps he is leaving the findings on the impact on intelligence to another paper.

Because reviewers asked us to do so many robustness checks (in the end the appendix is 59 pages long), we didn’t have space to explore the heterogenous effect between rural and urban areas and across occupations in our paper.

In our paper, we didn’t compare the rural and urban sample. It is possible to run separate regressions to see if there are any systematic differences. Urban pollution has received more media attention although the surrounding areas may be more polluted. For example, most the pollutants for Beijing come from nearby counties in Hebei Provinces, where most polluted industries are located. In fact, air quality in many counties in Hebei province are worse than in Beijing.

In another related paper, we look at the impact of air pollution on happiness between those working indoors or outdoors and find indeed greater impact for those working outdoors. See the attached paper.

I suggested to Prof Zhang suppose that he might look back at those who were in very polluting occupations, and thus find the upper limits of the 3 year effect.

In summary, these are interesting findings which will have to be followed up. At the moment the reported effect of pollution is perplexing, and we may need a better model of how pollutants affect the nervous system.

• Category: Science 
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  1. It’s all just a libtard treehugger plot. Pollution is good for you.

  2. As with any other website, this one hates criticism.

  3. FKA Max says:

    The following might be a factor:

    Exposure to ambient air pollution–does it affect semen quality and the level of reproductive hormones?


    The statistically significant association was observed between abnormalities in sperm morphology and exposure to all examined air pollutants (PM10, PM2.5, SO2, NOX, CO). Exposure to air pollutants (PM10, PM2.5, CO, NOx) was also negatively associated with the level of testosterone. Additional exposure to PM2.5, PM10 increase the percentage of cells with immature chromatin (HDS).

    Men’s Test Scores Linked to Hormone

    The findings conform with earlier, little-publicized research showing that men with low levels of testosterone perform better on tasks like mentally rotating a three dimensional object, which involve spatial reasoning skills that are critical in much of mathematics. Earlier research has also shown that men’s testosterone levels tend to be lower in the spring.

    TESTOSTERONE LEVELS can affect performance on some tests. Women with high levels of testosterone perform better on spatial tasks (top) than women with low levels do, but men with low levels outperform men with high levels. On a test of perceptual speed in which women usually excel (bottom), no relation was found between testosterone and performance.

    Source: Archived link:

    More here:

    The mismatch effect: When testosterone and status are at odds

    results from Study 1 provide insight into the consequences of a mismatch between one’s desired level of status and actual level of status. First, consistent with our previous research, we found that cognitive functioning was impaired under conditions of mismatch. Participants high in testosterone performed worse on the analytical GRE when they were in a position of low status. Building on previous research, we found that participants low in testosterone showed the opposite effect. They performed worse on the analytical GRE when they were placed into a position of high status. Although it remains speculative at this point, it is possible that the desire for status change may prove too distracting for the proper functioning of complex higher-order cognition.

  4. Anonymous[370] • Disclaimer says:

    Clean air is not an option. The human race cannot survive without automobiles. The legs nature provided for mobility are totally inadequate. One must use them only as a form of recreation, well away from the path of automobiles, lest they be considered “fair game” like the rest of nature’s animals who do not inhabit automobiles.

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