New replication: I find that the results in Moretti (AER 2021) are caused by coding errors. The paper studies agglomeration effects for innovation (do bigger cities cause technological progress?), but the results supporting a causal interpretation don’t hold up.
New replication: I find that the results in Moretti (AER 2021) are caused by coding errors. The paper studies agglomeration effects for innovation (do bigger cities cause technological progress?), but the results supporting a causal interpretation don’t hold up.
https://twitter.com/michael_wiebe/status/1749462957132759489