I was reading about the replicability crisis in Psychology and Medicine. Many psychology experiments, for instance, were being conducted on undergraduate students, with too low sample sizes, which claimed statistically significant results. And there was no attempt to redo those experiments with larger sample sizes by independent researchers. Many such results were generally accepted as true by the psychology community without proper scrutiny. It is only in the last decade or so that psychologists have seriously started to try to replicate many such studies with larger sample sizes, getting significant results in the same direction in only about one third of the studies, hence the crisis.
A similar replication attempt of experimental economics results published in the AER saw a two third replication rate, twice that of psychology.
But my point is, most empirical studies in economics are not experimental, but quasi-experimental. The data is often publicly available from government records etc. In such studies, their is no point of "redoing the experiment with larger sample size". What would replication mean in such studies: would it mean answering a similar question with different data and getting the same result? Even if the technique is not the same (for example if the first was a discontinuous regression on Swedish data to see the effects of class size on scores, can the second study be a Diff-in-diff on Brazilian data to answer the same question)?
And because usually the sample sizes in such quasi-experimental studies (even without replication) is usually quite large, can we say that in general replication is not an issue in Economics? Especially with the data being public. Or is my understanding of replication in quasi-experimental studies wrong?