1. Why the difference? It wasn’t because of a difference in the available information. As Koudijs and Voth point out, everybody in Dutch financial circles knew and understood the magnitude of what had happened. Nor was it because the Seppenwolde lenders had to rebuild their own finances. Within weeks of the default, the lenders knew they hadn’t lost any money.
2. Peer review is an evaluation of work by one or more people of similar competence to those who produce the work, which helps validate research.