[verteu]

No, it's about as "controversial" as claiming lead exposure is bad for children's brains.

Do we have RCTs for that? Or might we reasonably shape our priors from the hundreds of studies using a dozen different causal methodologies, which all find the same result?

[dash2]

The evidence for lead exposure harming children's brains is extremely solid, I believe. The evidence for spanking is not in the same league. It is not just about a lack of RCTs.