The author line of a scientific paper looks deceptively simple:
A. Sharma¹, R. Gupta², M. Singh¹,³*
A few names. A few superscript numbers. A star. Perhaps an email address.
But this small strip of text is one of the most politically charged, ethically important, career-shaping regions of the entire paper. It decides who gets credit, who carries responsibility, which institutions are recognized, who speaks for the work, and how the paper will be found, counted, indexed, cited, evaluated, and argued over for years.
The byline is not decoration. It is the paper’s passport control desk. 🛂📄
1. What does authorship actually mean?
Authorship is both credit and accountability. The International Committee of Medical Journal Editors, or ICMJE, states that authorship has academic, social, and financial implications, but also implies responsibility and accountability for the published work. (ICMJE)
This double nature is essential. Authorship is not a thank-you note. It is not a reward for being senior. It is not a political garland. It says:
“I made a qualifying intellectual contribution, I approved this paper, and I am willing to take responsibility for its integrity.”
The ICMJE recommends four criteria for authorship: substantial contribution to conception/design or data acquisition/analysis/interpretation, drafting or critically revising the work, final approval of the published version, and agreement to be accountable for all aspects of the work. All four criteria should be met. (ICMJE)
A useful rule:
If someone deserves credit but cannot take responsibility, they may belong in the acknowledgements.
If someone takes responsibility but did not contribute intellectually, they do not belong as an author.
That sounds simple. In real labs, it can become a monsoon in a teacup.
2. Who should be an author?
A person should usually be considered for authorship when they have made a substantial intellectual contribution to the work. This may include designing the study, developing the hypothesis, generating key data, analyzing results, interpreting findings, writing the manuscript, or critically revising it.
Examples of contributions that often support authorship:
| Contribution | Usually supports authorship? |
|---|
| Designed the study | Yes |
| Developed the central hypothesis | Yes |
| Generated major experimental or clinical data | Often yes |
| Performed substantial analysis or modeling | Often yes |
| Interpreted results intellectually | Yes |
| Wrote the first draft | Yes |
| Critically revised the manuscript for intellectual content | Yes |
| Approved the final version and accepts accountability | Required |
But some activities alone do not normally qualify for authorship. ICMJE specifically notes that acquisition of funding, general supervision, administrative support, technical editing, language editing, proofreading, and writing assistance alone do not qualify someone for authorship, although such contributors may be acknowledged. (ICMJE)
This distinction is crucial. A department head who only provided permission is not automatically an author. A technician who performed routine work may be acknowledged unless their contribution became intellectually substantial. A statistician who designed the analysis and interpreted results may very much deserve authorship. A “senior name” added to improve prestige is not authorship. It is academic incense smoke.
3. Ghost, guest, gift, and honorary authorship
Authorship problems have wonderfully theatrical names, but they are not harmless.
| Problem | Meaning |
|---|
| Ghost authorship | Someone who made a substantial contribution is omitted |
| Guest authorship | Someone is added because their name may increase prestige or publication chances |
| Gift or honorary authorship | Someone is added due to hierarchy, friendship, gratitude, or position rather than contribution |
The Council of Science Editors defines guest authorship as authorship based on the expectation that including a name will improve publication chances or status, even when the person made no discernible contribution. It defines honorary or gift authorship as authorship based on tenuous affiliation, such as department-head status alone. (councilscienceeditors.org)
Ghost authorship is the opposite sin: someone who actually contributed meaningfully is hidden. This is especially dangerous in industry-sponsored or medical writing contexts, where hiding a writer, analyst, sponsor, or designer can obscure responsibility and conflicts of interest.
A paper with gift authors becomes inflated. A paper with ghost authors becomes haunted. 👻
4. Who decides the author list?
The authors do. Not the journal editor.
ICMJE says the people who conduct the work are responsible for identifying who meets authorship criteria, ideally while planning the work and then revisiting the decision as the project evolves. It also states that the author group, not editors, decides author order, and that unresolved authorship disputes should be investigated by the institution where the work was performed. (ICMJE)
This is why authorship should be discussed early, not after the manuscript is ready. A good project begins with an authorship conversation and keeps a living authorship record.
A practical authorship workflow:
Discuss expected authorship at project start.
Record expected roles.
Revisit after major experiments, analysis, and drafting.
Confirm order before submission.
Get approval from every author before submission.
Keep documentation of contributions.
Authorship delayed is resentment fermented.
5. Author order: why the first and last positions sparkle
In many biomedical, life-science, and experimental fields, author order is contribution-sensitive.
Common convention:
| Position | Usual meaning in many biomedical/life-science fields |
|---|
| First author | Did most of the work and often wrote the first draft |
| Middle authors | Contributed in decreasing, negotiated, or role-based order |
| Last author | Senior supervising author, principal investigator, or group leader |
| Corresponding author | Handles journal communication and post-publication queries |
This is not universal law. It is convention. But careers are built on conventions, which means bylines must be handled carefully.
The first author often receives major credit for execution. The last author often receives credit for supervision, conceptual leadership, funding, laboratory direction, or senior responsibility. In many biomedical contexts, a strong publication record is read not only by counting papers, but by reading positions: first-author papers, corresponding-author papers, and senior-author papers.
But conventions vary. A physicist, economist, mathematician, clinician, historian, and computational biologist may read the same byline differently. The author list is a dialect, and every field has an accent.
6. Alphabetical authorship: when order is not contribution
Some fields list authors alphabetically. Mathematics is one of the classic examples. A 2025 study in Scientometrics describes mathematics as one of the few scientific disciplines where alphabetical ordering of co-authors remains the prevailing convention rather than contribution-based ordering. (Springer)
Economics also commonly uses alphabetical ordering. The American Economic Association notes that economics papers typically list coauthors alphabetically, and only a minority of two-author pairs reverse the order to signal greater contribution by the first author. (American Economic Association)
A broader bibliometric study found that intentional alphabetical authorship was declining overall, with mathematics, economics, and high-energy physics among the fields where it remained most common. (ScienceDirect)
Alphabetical authorship has virtues: it avoids endless contribution-ranking battles and can signal equality. But it also has problems. Alphabetical order can hide unequal contribution and may advantage researchers whose surnames appear earlier in the alphabet. The AEA specifically notes concerns that earlier names receive more visibility and that the “et al.” convention can obscure later names. (American Economic Association)
So the best practice is simple:
If author order is alphabetical, say so clearly.
Example footnote:
“Authors are listed alphabetically; all authors contributed equally to the conceptual development of the work.”
Or:
“Authors are listed alphabetically according to field convention. Individual contributions are specified in the Author Contributions section.”
7. Shared first authorship and equal contribution
Modern papers increasingly include shared authorship notes:
“These authors contributed equally: A. Sharma and R. Gupta.”
This is common when two researchers contributed comparably to experimental work, analysis, or manuscript preparation. Shared first authorship is useful, but it should not be sprinkled like decorative confetti. It should reflect genuine comparable contribution.
Important points:
Journals differ in how many equal first authors they allow.
Some indexing systems do not fully capture equal contribution.
CVs should explicitly mark equal contribution.
The first listed among equal contributors may still receive more visibility in citations.
Equal contribution should be reflected in the Author Contributions section.
Nature Portfolio allows one set of co-authors to be marked as having contributed equally and one set to be marked as jointly supervising the work; other equal contributions are best described in author contribution statements. (Nature)
Example:
“A.S. and R.G. contributed equally to experimental design, data generation, analysis, and manuscript drafting.”
That is better than a bare symbol with no explanation.
8. Shared senior authorship and joint supervision
Some papers state:
“M.S. and N.R. jointly supervised this work.”
This is especially common in collaborative biomedical, engineering, computational, and multi-lab papers. It signals that two or more senior investigators provided major intellectual, supervisory, infrastructural, or funding leadership.
But joint supervision should be used carefully. It should not be a consolation prize for authorship politics. It should answer: who actually supervised the work, took senior responsibility, shaped interpretation, secured resources, and helped steer the manuscript?
A clean statement:
“M.S. and N.R. jointly supervised the project, secured funding, interpreted the data, and critically revised the manuscript.”
Again, the contribution statement is the broom that sweeps away ambiguity.
9. The corresponding author: the paper’s diplomatic passport
The corresponding author is not automatically the most important scientist, although they often are. Their main role is communication and coordination.
ICMJE defines the corresponding author as the person who takes primary responsibility for communication with the journal during submission, peer review, and publication. This person typically ensures that administrative requirements such as authorship details, ethics approval, trial registration, and disclosures are completed. (ICMJE)
Nature Portfolio describes the corresponding author as responsible for ensuring all authors agree to be listed, approve submission, and for managing communication between the journal and co-authors before and after publication. It also assigns the corresponding author responsibilities for competing interest statements, data/code/materials transparency, proof accuracy, and post-publication queries. (Nature)
The corresponding author must therefore be organized, responsive, and trusted. They are the switchboard operator in the storm.
Responsibilities usually include:
submitting the manuscript,
communicating with the editor,
coordinating responses to reviewers,
confirming author approval,
checking proofs,
ensuring affiliation/address accuracy,
handling data/code/material requests,
answering post-publication questions,
informing co-authors about corrections or concerns.
Some papers have multiple corresponding authors, especially in multi-lab collaborations. But one person often remains the submission-system contact.
10. Can the first author also be the corresponding author?
Yes. In many cases, the first author may also be corresponding author, especially when they led the work and can handle technical questions. In some fields, however, the senior author is commonly corresponding author because they control the lab, grant, samples, long-term data storage, and post-publication responsibility.
A sensible rule:
The corresponding author should be the person best able to handle editorial communication and future questions about the work.
For a PhD student-led paper, a student can be corresponding author if the journal allows it and the team agrees. But long-term availability matters. If the student is moving institutions, a senior co-corresponding author may help preserve continuity.
11. Author contribution statements: the byline’s X-ray
A byline tells us who. A contribution statement tells us how.
Many journals now require author contribution statements because author order alone cannot express complex teamwork. ICMJE notes that some journals request and publish information about contributions, and editors are encouraged to implement contributorship policies. (ICMJE)
The CRediT taxonomy is one widely adopted system. It is a community-owned taxonomy of 14 contributor roles designed to capture key types of contributions to research outputs, including journal articles. Its roles include conceptualization, data curation, formal analysis, funding acquisition, investigation, methodology, project administration, resources, software, supervision, validation, visualization, writing-original draft, and writing-review and editing. (CRediT)
A strong contribution statement looks like this:
Conceptualization: R.D., N.A.
Methodology: M.A., R.D., N.A.
Investigation: M.A., S.K.
Formal analysis: M.A., P.R.
Visualization: M.A.
Supervision: N.A., R.D.
Funding acquisition: N.A.
Writing, original draft: M.A.
Writing, review and editing: all authors.
This is much better than:
“All authors contributed equally.”
That phrase is sometimes true. Often it is fog wearing a badge.
12. Acknowledgements: credit without authorship
Not everyone who helps should be an author. But many people deserve visible thanks.
Acknowledgements may include:
technical assistance,
language editing,
administrative help,
equipment access,
sample collection support,
general supervision not meeting authorship threshold,
funding or institutional support,
advice from colleagues,
permission to use facilities,
medical writing assistance, when appropriate and transparent.
ICMJE says contributors who meet fewer than all authorship criteria should not be listed as authors but should be acknowledged. (ICMJE)
Important courtesy: some journals require permission from acknowledged individuals because acknowledgement may imply endorsement.
A good acknowledgement is precise:
“We thank Dr. X for assistance with SEM imaging and Ms. Y for technical support during hydrogel preparation.”
Not:
“We thank everyone who helped directly or indirectly.”
That line is sweet but nutritionally thin.
13. AI authorship: can ChatGPT be an author?
No, under major current biomedical and publication-ethics guidance, AI tools should not be listed as authors.
ICMJE states that humans are responsible for submitted material that includes AI-assisted technologies, that authors should review and edit AI output because it may be incorrect, incomplete, or biased, and that authors should not list AI or AI-assisted technologies as authors or co-authors. (ICMJE)
ICMJE also states that authors must ensure appropriate attribution for quoted material and that referencing AI-generated material as a primary source is not acceptable. (ICMJE)
COPE similarly states that authors are fully responsible for manuscript content, including AI-produced parts, and that AI tools cannot take responsibility in the way human authors can. (Publication Ethics)
Why AI cannot be an author:
| Authorship requirement | Can AI satisfy it? |
|---|
| Take legal and ethical responsibility | No |
| Approve final version as accountable agent | No |
| Resolve integrity questions | No |
| Hold conflicts of interest | No |
| Be contacted after publication | No |
| Understand institutional obligations | No |
But AI use may need to be disclosed depending on journal policy. A good disclosure might say:
“The authors used an AI-assisted language tool to improve grammar and clarity. All scientific content, interpretation, citations, and final wording were reviewed and approved by the human authors, who take full responsibility for the manuscript.”
Do not hide AI use if the journal asks for disclosure. Also, never cite AI as though it were a primary source. It is a tool, not a witness.
14. Author affiliations and addresses: why they matter
Affiliations and addresses are not clerical leftovers. They affect:
Nature Portfolio states that the primary affiliation for each author should be the institution where the majority of the work was done, and a current address may be stated if the author has moved. (Nature) Taylor & Francis similarly says authors should list relevant affiliations to attribute where the research was approved, supported, or conducted, and if authors have moved, they should list the affiliation where the work was conducted and include the current affiliation as a note. (Author Services)
A good affiliation usually includes:
Department, Institution, City, State/Province if needed, Postal code if required, Country.
Example:
¹ Department of Science, All India Sciences Bhopal, Bhopal, Madhya Pradesh, India
² Department of Science, All India Sciences Bhopal, Bhopal, Madhya Pradesh, India
³ Present address: Department of Biomedical Engineering, X University, City, Country
* Correspondence: author@email.edu
Avoid:
¹ AIS
² Lab
³ India
That is not an address. That is a breadcrumb.
15. Multiple affiliations: how to list them clearly
Many authors belong to more than one institution. Use superscript numbers to map authors to affiliations.
Example:
Siya Agrawal¹, Amit Shah², Nita Singh¹*
¹ Department of Science, AIS Bhopal, Bhopal, India
² Department of Science, AIS Bhopal, Bhopal, India
* Correspondence: author@example.edu
For multiple affiliations:
Ajit R. Dwivedi¹,²
Then list both institutions.
Best practices:
Use each affiliation once.
Use consistent institutional names.
Avoid abbreviations unless globally recognizable or defined.
Include present address separately.
Do not list honorary affiliations unless relevant and permitted.
Ensure all authors approve their affiliations.
Confirm spellings before proof approval.
Nature Portfolio says the corresponding author is responsible after acceptance for accuracy of names, addresses, and affiliations in the proof. (Nature)
That means one wrong department name can become a permanent metadata tattoo.
16. Names, initials, ORCID, and identity
Author names are not always simple. Initials can collapse different people into one shadow. Names may change. Transliteration may vary. Some people have mononyms. Some names include particles, accents, hyphens, multiple family names, or non-Roman scripts.
ORCID helps reduce this confusion. ORCID describes itself as a free, unique, persistent identifier for individuals involved in research, scholarship, and innovation. (ORCID) Nature Portfolio requires corresponding authors of published papers to provide an ORCID iD and encourages co-authors to provide one. (Nature)
Best practices:
Use the same name format across publications where possible.
Use ORCID.
Check how your name appears in PubMed, Scopus, Web of Science, Google Scholar, and institutional repositories.
Use accents and full names where supported.
Avoid inconsistent initials across papers.
Confirm metadata at proof stage.
Nature Portfolio lists author names in Roman alphabet characters as standard, while supporting some non-Roman scripts in parentheses in online HTML versions. (Nature)
A name is not just a label. It is the thread by which your work is stitched into the literature.
17. Consortium and group authorship
Large collaborations sometimes publish under a group name:
The XYZ Consortium
This is common in genomics, high-energy physics, clinical trials, epidemiology, and large observational networks. Consortium authorship helps represent large-scale work where hundreds or thousands of people contributed.
Nature Portfolio allows a collective of authors to be listed as a consortium and says all authors within a consortium must be listed at the end of the paper; members who did not directly contribute may be placed in supplementary information if necessary. (Nature)
NLM/MEDLINE handles group authors and collaborators carefully. It enters group names as they appear in the article, and when a consortium or study group appears in the byline, individual names published in the article text may be entered as collaborator names. (National Library of Medicine) NLM also states that PubMed displays authors in the order they appear in the published byline, including personal and corporate authors. (National Library of Medicine)
This matters because being a named collaborator may or may not appear the same way as being a byline author in databases, CVs, institutional metrics, and promotion dossiers. NLM notes that collaborators had a role in the research but were not necessarily authors. (National Library of Medicine)
Practical rule:
In consortium papers, clarify who is a byline author, who is a consortium member, who is a collaborator, and how the names will be indexed.
Large-team science needs large-team clarity.
18. Local authorship and research equity
Authorship is also an equity issue.
ICMJE warns editors to be aware of the exclusion of local researchers from low- and middle-income countries when data come from those countries, and notes that including local authors adds fairness, context, and implications to the research. (ICMJE) Nature Portfolio similarly encourages collaboration with colleagues where research is conducted and expects their inclusion as co-authors when they fulfill authorship criteria. (Nature)
This matters in field biology, anthropology, public health, genomics, clinical research, biodiversity, traditional knowledge, and global health. Researchers who enable study design, recruitment, interpretation, sample access, ethics, local logistics, language, cultural context, and implementation should not disappear into acknowledgements while distant institutions collect the byline harvest.
A fair paper asks:
Were local researchers involved in study design?
Did they help interpret local relevance?
Are they included as authors when criteria are met?
Are local institutions properly affiliated?
Are local literatures cited?
Are data ownership and benefit sharing clear?
Authorship should not behave like scientific extraction dressed in polite fonts.
19. Changing authors after submission
Author-list changes after submission are sensitive. Journals usually require written agreement from all authors.
ICMJE says if authors request addition or removal after submission or publication, journal editors should seek an explanation and signed agreement from all listed authors and from the author being added or removed. (ICMJE) Nature Portfolio says changes in author order, addition, deletion, corresponding author, or author sequence after submission require approval by every author, and that changes are not permitted after acceptance. (Nature)
This is why the author list should be settled before submission. Changing it later can delay review, trigger ethics queries, or reveal unresolved lab politics.
A good lab practice is to maintain an authorship decision document:
| Date | Decision | Reason | Approved by |
|---|
| Jan 10 | A and B expected co-first | Equal experimental/data contribution | All |
| Mar 15 | C added as author | Developed statistical model | All |
| May 2 | D acknowledged | Technical imaging support only | All |
It sounds bureaucratic until you need it. Then it becomes a lifeboat.
20. How to list authors and addresses: a practical template
Here is a clean biomedical-style template:
Title
Siya Agrawal¹, Amit Shah², Ajit Ravi Dwivedi¹,³, Nitu Singh¹*
¹ Department of Translational Medicine, All India Institute of Medical Sciences Bhopal, Bhopal, Madhya Pradesh, India
² Department of Cardiology, All India Institute of Medical Sciences Bhopal, Bhopal, Madhya Pradesh, India
³ Present address: Department of Biological Sciences, Example University, New Delhi, India
* Correspondence: neha.arya@example.edu
† These authors contributed equally: Mukti Agrawal and Bhushan Shah.
‡ These authors jointly supervised this work: Rajeev Ranjan Dwivedi and Neha Arya.
Author contributions
S.A. performed experiments, analyzed data, prepared figures, and wrote the original draft. A.S. contributed clinical interpretation and methodology. A.R.D. contributed conceptualization, supervision, interpretation, and manuscript revision. N.S. conceived and supervised the study, secured resources, and revised the manuscript. All authors approved the final manuscript and agree to be accountable for the work.
Acknowledgements
We thank X for technical assistance with SEM imaging and Y for access to Z facility.
This kind of structure gives the paper a clean spine.
21. Common mistakes in author and address listing
| Mistake | Why it matters | Fix |
|---|
| Adding department head automatically | Gift authorship risk | Add only if authorship criteria are met |
| Forgetting someone who analyzed data | Ghost authorship risk | Discuss contributions early |
| Changing order after acceptance | May be prohibited | Finalize before submission |
| Using “all authors contributed equally” vaguely | Not transparent | Use CRediT or detailed roles |
| Wrong affiliation | Misallocates credit | Use institution where work was done |
| Missing present address | Readers cannot find moved author | Add present-address note |
| AI listed as author | Not acceptable under major guidance | Disclose AI tool use instead |
| No corresponding-author email | Blocks communication | Include active email |
| Multiple meanings of symbols | Confuses reader | Define *, †, ‡ clearly |
| Inconsistent name spelling | Damages indexing | Use ORCID and consistent format |
22. A small authorship etiquette code for research groups
Before the project begins:
“Who is likely to be first author? Who is senior author? What contributions could change the order?”
During the project:
“Have roles changed? Has someone contributed enough to join the author list? Has someone’s contribution remained acknowledgement-level?”
Before submission:
“Does every author meet criteria? Does everyone approve the order, affiliations, contribution statement, and final manuscript?”
After publication:
“Who handles queries, data requests, corrections, and reuse questions?”
Authorship is easiest when treated as a living conversation, not a postmortem negotiation.
Final thought: the byline is a moral instrument
A scientific paper is not written by “the lab.” It is written by people. People with hands, ideas, instruments, code, reagents, patients, field sites, late nights, arguments, failures, and oddly specific coffee rituals.
The author list should tell the truth about that work.
Not a political truth. Not a flattering truth. Not a hierarchical truth. A scholarly truth.
The best byline is not the one that keeps everyone comfortable. It is the one that makes credit and responsibility visible, defensible, and fair. When done well, the author list becomes a tiny architecture of justice at the top of the page. 🧬✍️
References and further reading
International Committee of Medical Journal Editors. Defining the Role of Authors and Contributors. This is essential reading for biomedical authorship criteria, corresponding author duties, non-author contributors, and AI authorship guidance. (ICMJE)
COPE. Authorship and AI tools. A key ethics position explaining why AI tools cannot be authors and why humans remain responsible for manuscript content. (Publication Ethics)
CRediT. Contributor Role Taxonomy. Official resource for the 14-role taxonomy used to describe author contributions. (CRediT)
Nature Portfolio. Authorship policy. Useful for corresponding author responsibilities, affiliations, consortium authorship, author contribution statements, equal contribution, joint supervision, ORCID, and global research inclusion. (Nature)
Council of Science Editors. Authorship and Authorship Responsibilities. Helpful for understanding guest, gift, and honorary authorship. (councilscienceeditors.org)
Waltman L. An empirical analysis of the use of alphabetical authorship in scientific publishing. Important bibliometric study on alphabetical author order across fields. (ScienceDirect)
Donner P. Alphabetical author order and co-author contributions in mathematics. Useful recent analysis of mathematics as a field where alphabetical authorship remains common. (Springer)
American Economic Association. What’s in a name? A clear discussion of alphabetical author order in economics and its consequences. (American Economic Association)
National Library of Medicine. Authorship in MEDLINE. Useful for understanding group authors, collaborators, consortium names, and PubMed/MEDLINE indexing. (National Library of Medicine)
ORCID. Open Researcher and Contributor ID. Official resource for persistent researcher identifiers and author-name disambiguation. (ORCID)
