Can Lead Poisoning Explain Low Test Scores in Poor Countries?
In a new paper, we examine the connection between exposure to lead—a dangerous but prevalent neurotoxicant—and children’s learning outcomes. We find that lead poisoning alone could account for more than 20 percent of the learning gap between rich and poor countries. Given the comparative ease of, say, banning lead paint compared to comprehensive education reform, policymakers interested in improving children’s learning outcomes may want to consider lead exposure as fairly low-hanging fruit.