A collection of interesting links spanning architecture, science, politics and economics, with commentary on studies about lithium, lead exposure, minimum wage, and free speech. Longer summary

This is a links post where Scott Alexander shares various interesting articles and studies from around the internet. It covers a wide range of topics including architecture, science, politics, economics, and social issues. Notable items include a study showing lithium in drinking water may not have significant effects, research about the lead-crime hypothesis, discussions about minimum wage studies in Seattle, and various pieces about free speech and campus politics. Shorter summary