Authorship is meant to reflect who contributed to the research and who takes responsibility for it. Terms like ghost authorship, gift authorship, and guest authorship describe different kinds of gaps between contribution and credit.
For peer reviewers, authorship is not something that can be confirmed directly. What is available is the manuscript itself, along with contributor statements, acknowledgments, and disclosures. These elements can offer context, even if they do not provide a complete picture.
Understanding the terms
Ghost authorship occurs when someone who made a substantial intellectual contribution to a paper is not named as an author. This can include a professional writer or analyst who substantially shaped the manuscript, or a junior researcher whose experimental or analytical contribution is suppressed in favor of more senior names.
Gift authorship occurs when someone is named as an author despite having made no meaningful intellectual contribution to the work. This is often offered as a courtesy to a senior colleague, department head, or funding agency representative.
Guest authorship refers to adding a high-profile name to an author list, with or without their knowledge, to improve the paper’s chances of acceptance. These issues are related because all involve a mismatch between contribution, credit, and accountability.
What reviewers have access to
Reviewers work with what is submitted to the journal. This usually includes the manuscript content, author names and affiliations depending on the type of blinding, contributor role statements when provided, acknowledgments, funding information, and conflict of interest disclosures.
Reviewers do not have access to how the manuscript was developed over time or how authorship decisions were made within the research group. Any observation about authorship is therefore based on what is visible in the submission.
Reading contributor information closely
Many journals now include structured contributor role statements, often based on the CRediT framework. These statements describe who was involved in conceptualization, data curation, formal analysis, writing, review, and other parts of the work.
- Whether writing responsibilities are clearly assigned.
- Whether multiple authors are linked to core intellectual tasks.
- Whether some roles are concentrated with a single individual.
These observations do not lead to conclusions on their own, but they help build context.
Looking at the acknowledgments
The acknowledgments section can provide additional details about contributions not reflected in the author list. It may include technical support, analytical support, drafting assistance, editing assistance, or input on specific parts of the work.
If the acknowledgments describe activities such as drafting sections of the manuscript or carrying out analysis, read them alongside contributor roles to understand how contributions are being presented.
Paying attention to the structure and writing
Manuscripts are often written by multiple contributors, so variation in style is not unusual. At the same time, noticeable differences in tone, detail, or clarity between sections can prompt a closer read.
- One section may be highly detailed and structured while another appears more general.
- Technical explanations may vary in depth across sections.
- The level of clarity may shift between the introduction, methods, and discussion.
These patterns do not point to a specific explanation, but they can be part of how a reviewer engages more closely with the text.
Author list and scope of work
The size and composition of the author list can be read in relation to the work described in the manuscript. Some studies involve multiple types of expertise, such as experimental work, statistical analysis, and data management.
- How the listed authors connect to the different parts of the work.
- Whether contributor roles reflect the range of activities described.
- How acknowledgments complement the author list.
How to respond as a peer reviewer
If something in the manuscript raises a question about authorship or contributions, share it in confidential comments to the editor. Keep the focus on what is visible in the submission and point to specific sections, such as a contributor statement or acknowledgment.
Authorship concerns are rarely something reviewers can resolve from the manuscript alone. What they can do is read contributor statements, acknowledgments, and disclosures with care, and note visible inconsistencies in a measured, evidence-based way.
