If you're looking for more reading on the Lead-Crime Hypothesis, Drum's "An Updated Lead-Crime Roundup for 2018" (https://www.motherjones.com/kevin-drum/2018/02

If you're looking for more reading on the Lead-Crime Hypothesis, Drum's "An Updated Lead-Crime Roundup for 2018" (https://www.motherjones.com/kevin-drum/2018/02/an-updated-lead-crime-roundup-for-2018/ https://www.motherjones.com/kevin-drum/2018/02/an-updated-le...) has a lot more information. Section 3 has some direct links to research papers, if that's your thing.