Publishing

Preprint

A preprint is a complete scholarly manuscript posted to a public server before, or in parallel with, formal peer review. Servers such as arXiv, bioRxiv, medRxiv, and SSRN let researchers share findings immediately, establish priority, and gather feedback, at the cost that the work has not yet been vetted.

Preprints decouple dissemination from certification. The moment a paper is ready, it can reach readers worldwide, months before a journal decision, which accelerates fields and was vividly useful during the COVID-19 pandemic. Most preprint servers screen for obvious problems and plagiarism but do not conduct peer review, and many papers are later revised substantially before formal publication.

That absence of review is the essential caveat. A preprint carries no guarantee of validity, and journalists and practitioners who treat unreviewed claims as established have repeatedly been burned. Responsible use means labeling preprints clearly and treating their conclusions as provisional.

Most journals now permit or encourage preprinting, and preprints receiving DOIs are citable. For authors, posting a preprint can also invite the kind of scrutiny that improves the manuscript before it reaches a journal's reviewers.