Most theories of intelligence do not directly address the question of whether people with
high intelligence can successfully solve real world problems. A high IQ is correlated with …

I published the first study of national IQs and their correlates in 2002 in collaboration with the
political scientist Tatu Vanhanen. We published further studies on these in 2006 and 2012 …

This paper investigates the effect of intelligence on deforestation rates, using data from 186
nations, over the period 1990–2010. Our findings provide novel evidence that human …

Does the intelligence quotient (IQ) in a nation regulate the ease of doing business? Based
on the normal distribution of IQ scores within a nation, the population was classified into …

For years, criminologists have studied the relationship between crime and below-average
intelligence, concluding that offenders usually possess IQ scores of 8 to 10 points below …

Though physiological effects of exposure to airborne lead on cognitive function and crime
have been discussed in literature, to date, no studies examined other outdoor or ambient air …

While country-level differences in psychometric intelligence and school achievement are
used increasingly in cross-cultural research, far less is known about country-level …

Evolutionary neuroandrogenic (ENA) theory asserts that brain exposed to androgens plus
the brain's ability to learn accounts for most of the sex and age variations in criminal …

As professors, we spend much of our time watching students learn, so not surprisingly, our
definition of what it means to have high intelligence centers on the ability to learn complex …

Existing theoretical and empirical evidence on the determinants of students' performance
reveals a direct link between pre-primary education and achievement test scores in primary …