Abstract: Authorship on scientific publications has become the currency of modern science and a measure of a scientist's participation in the international community. The number of papers a scientist publishes, the journals in which they are published and the position of a scientist's name on the list of authors are all crucial when it comes to promotions, funding and employment decisions. Nevertheless, the attribution of authorship in contemporary academic science has become an increasingly delicate issue. Obvious shortcomings in the system and an inability to react to new developments in science, such as larger research groups and collaborations, have led scientists, editors and science administrators to debate whether the present authorship system should be modified and how best it should operate. Authorship is the fulfilment of a responsibility Furthermore, the need to produce a long list of publications when applying for positions or funding has further contributed to an inflation in the number of contributors. If group or department leaders put the names of their junior scientists on a paper to give them an advantage in the 'rat race' for jobs and money, this is certainly generous, but it ultimately dilutes the work of others. "I think that the one thing that is wrong with the authorship system is when someone becomes an author on a paper to which they have contributed nothing, in other words, honorary authorship," said Iain Mattaj, Scientific Director of the European Molecular Biology Laboratory (Heidelberg, Germany) and Executive Editor of The EMBO Journal. The inflation in authorship is associated with the extensive collaborative dimension that science has assumed This leaves the scientific community with the question of who qualifies as an author. Unfortunately, there is no universally defined system for such an assessment. The International Committee of Medical Journal Editors (ICMJE), a body representing hundreds of general biomedical journals, has long been concerned with this problem and has attempted to provide sensible and standard criteria for the definition of authorship. "Authorship credit should be based on 1) substantial contributions to conception and design [of the project], or acquisition of data, or analysis and interpretation of data; 2) drafting the article or revising it critically for important intellectual content; and 3) final approval of the version to be published. Authors should meet conditions 1, 2, and 3," is the ICMJE's present definition (http://www.icmje.org). If an individual does not meet these criteria or if no task can reasonably be attributed to them, then they should not be credited with authorship. The US National Institutes of Health (NIH) have similar directions and instructions in their 'Guidelines for the Conduct of Research in the Intramural Research Program', in which they state that "individuals who have assisted the research by their encouragement and advice or by providing space, financial support, reagents, occasional analyses or patient material should be acknowledged in the text, but not be authors." If, for instance, scientists conduct field research on a remote island and a fisherman provides access to his property for the collection of biological material, the fisherman will have made a vital contribution to the actualization of the study, but his efforts will probably not grant him authorship in any resulting publication. Similarly, someone providing a bench, a microscope or donating part of their funds towards the research of others should not automatically be granted co-authorship. "In my view the problem is not necessarily to define a contribution tightly, but to really be sure that people who are authors on a paper have made a significant contribution to it," Mattaj commented. In addition, honorary or ghost authorships and irresponsible or deceptive misconduct in publishing have created growing unease with the existing system and have encouraged scientists to seek alternatives. The main alternative framework for scientific authorship, which has been implemented only marginally within the scientific community, has been the contributorship system. First put forward by Rennie and his collaborators in 1997, this system states that every individual who has usefully added to the work should be listed as a contributor (Rennie et al, 1997). Although the number of contributors would not be limited, each name should be linked to a description of that person's contribution. In addition, one of the contributors would be designated as a guarantor of the whole work. Similar to the role of a senior researcher on a project, the guarantor would ensure the integrity of the work and would be considered accountable for all of its parts. …someone providing a bench, a microscope or donating part of their funds towards the research of others should not automatically be granted co-authorship The primary goal of these alternative systems is to reduce distortions of authorship and to provide more transparency to what is at present seen as an opaque process. The information describing each contributor's role would allow a reader to quickly understand who did what, and would clearly remove much of the ambiguity surrounding papers with several authors. However, these systems leave unresolved the question of the quantity and quality of each contribution, and whether all scientists' contributions would be accurately reflected. "I don't think having a contributorship rather than an authorship system would remove the possibility for abuses of the system, because if you can be a fake author, you can be a fake contributor, too," commented Mattaj. However valid and effective the alternative methods might be, it remains unclear how they could be implemented. "The bottlenecks are to try and convince both editors and societies of the benefit and practicality of the new systems. This may be especially hard when such systems are only at a theoretical stage," said Justus Verhagen, a neurophysiologist from the Department of Experimental Psychology at the University of Oxford, UK, and one of the authors of the QUAD system. Some claim that it would be sufficient if editors simply demanded a brief statement of each author's contribution as an additional requirement for manuscript publication. "It would appear to be a matter that is under the control of the journals," said Tom Scott from the College of Sciences at San Diego State University (CA, USA). "There is already a thicket of regulation to submitting an article—copyright transfers that must be signed, submission fees that must be paid, detailed instructions that must be followed. If the journal added a requirement that authors must declare their proportional contribution to any submitted article, that requirement would stand. Anything short of that, and authorship declaration will continue to be ignored." Therefore, it would be up to the editors of the most authoritative scientific journals to take the initiative. Few prospective authors would sacrifice the opportunity to publish in any of these journals simply because they were required to state their respective contributions. Journals such as Science and Nature already welcome statements specifying the contribution of each author, but this is not a requirement. "I don't think it would be a difficult exercise to require that authors stated their contributions," said Mattaj. …there are no sanctions or other forms of punishment for fraudulent authors beyond firing them or denying them access to funding In addition, directors of departments or institutes could enforce such declarations for all of the work produced at their establishments. "To the degree that directors must evaluate the productivity of their scientific employees, it would be to their advantage to have these additional data," concluded Scott. "The problem is not a lack of ability to get that information," commented Mattaj. "My imagination, though, of how this would develop, is that it would become formulaic and meaningless," he cautioned. "Very quickly people would copy phrases from one another such that the helpfulness would not be very high." As authorship is often the most important criterion by which selection committees decide on the careers of scientists, radical or sweeping changes in the present system are unlikely. But change might come if these committees used a different ranking system; indeed, it would probably even simplify their work if they adopted a more quantitative method to assess authorship and made the award system more transparent. But authorship is not everything. "My opinion is and has been that one needs to look at the candidate in detail and beyond authorship," commented Mattaj. "You cannot measure someone's contribution by looking at a paper, at what they have done. You also need to look at the candidates themselves, interview them and talk to them in detail, to have a good idea of what really their capabilities and contributions are."