Extent of contract cheating
The first published material detailing the extent of contract cheating is a study by Robert Clarke and Thomas Lancaster. The study presented three main findings:
- Over 12 percent of postings on a popular website for outsourcing computer contract work are actually bid requests from students looking to attempt contract cheating.
- Contract cheaters posted an average of 4-7 requests, suggesting that habitual use is made of such services by these students.
- A smaller number of users have posted over 50 bid requests, including examples from multiple institutions. This suggests that these are agencies subcontracting work, not students who are directly making use of the services.
Whereas the quality of solutions to assignments sold by essay mill has been questioned, a study by Jenkins and Helmore showed that work obtained through the use of an auction site was of sufficient quality to gain good marks and remain undetected by the module tutor.
A more recent study examined over 900 examples of contract cheating by students studying computing subjects. The published results categorise the assignment types (e.g. Programming, Database, Web Design) and are analysed by country. One new concern identified by this study was the number of major projects (both final year undergraduate and postgraduate) being posted onto auction sites.
In July 2007 a paper proposed a systematic six-stage process that tutors can use to detect students who are contract cheating.
From a study of 4,000 suspected cases of "contract cheating" some interesting patterns of behaviour have been observed. A summary was presented at the HEA Workshop on Contract Cheating (March 2008).
At the Aske conference held in June 2009 a paper detailing a "multi-faceted" approach to dealing with the problem of "contract cheating" was presented.
A paper presented at the STEM conference (April 2012) was a study of over 600 assignments in subject areas ranging from "Anthropology to Theology".
The Commercial Aspects of Contract Cheating are examined in a paper given at ITiCSE '13. This paper analyses the monetary value of contract cheating to the different parties who play a role in the contract cheating process. The main analysis is based on a corpus consisting of 14,438 identified attempts to cheat. The corpus was collected between March 2005 and July 2012.  
Although non-originality engines (like Turnitin) are unlikely to detect "outsourced" assignments submitted by students, there has been some success in using it to identify the source of assignments detected on auction sites. It is therefore suggested that staff upload copies of assignment briefs to Turnitin 
Prevention of Contract Cheating
The assignments prepared by essay-writing companies and other paid third-parties are supposedly 'original', meaning that they are likely to evade detection by software packages such as Turnitin. Assessment design strategies may limit the possibiity that students can use contract cheating services, although a 2014 publication in Educational Studies showed that reducing the time that students have to prepare their assessments is unlikely to deter contract cheating, and that there appeared to be significant spare capacity in the contract cheating market 
- Shepherd, Jessica (2008-05-06). "The rise of 'contract cheating' at universities". The Guardian (London).
- "Student cheats contract out work". BBC/bbc.com. 2006-06-12. Retrieved 2006-06-14.
- Lightfoot, Liz (2006-06-13). "Cheating students put assignments out to tender on the internet". London: Telegraph/telegraph.co.uk. Retrieved 2006-06-14.
- "The cybercheats making a small fortune". London: Daily Mail/dailymail.co.uk. 2006-06-17. Retrieved 2007-11-05.
- Clarke, Robert; Lancaster, Thomas (2006-06-19). "Eliminating the successor to plagiarism? Identifying the usage of contract cheating sites". CiteSeerX: 10.1.1.120.5440.
- Thomas Lancaster bio
- "Robert Clarke bio". Linkedin.com. Retrieved 2013-07-21.
- "T. Jenkins and S. Helmore "Coursework for cash: the threat from on-line plagiarism", in Proceedings of 7th Annual Conference for Information and Computer Science, Dublin. Higher Education Academy pp121-126 (August 2006)" (PDF).
- Clarke, Robert; Lancaster, Thomas (2007-08-30). "Assessing Contract Cheating Through Auction Sites – A Computing Perspective" (PDF). Retrieved 2007-09-13.
- Clarke, Robert; Lancaster, Thomas (2007-07-26). "The Establishing a Systematic Six-Stage Process for Detecting Contract Cheating". Retrieved 2011-01-09.
- Clarke, Robert; Lancaster, Thomas (2008-03-07). "The Private Life of an Assignment" (PDF). Retrieved 2011-01-09.
- Clarke, Robert; Lancaster, Thomas (2009-06-04). "Contract Cheating in UK Higher Education: promoting a proactive approach" (PDF). Retrieved 2011-01-09.
- Clarke, Robert; Lancaster, Thomas (2012-04-18). "Dealing with contract cheating: a question of attribution" (PDF). Retrieved 2012-05-03.
- Clarke, Robert; Lancaster, Thomas (2013-07-01). "Commercial aspects of contract cheating". Retrieved 2013-08-21.
- Clarke, Robert; Lancaster, Thomas (2013-07-01). "Commercial aspects of contract cheating (Slides)". Retrieved 2013-08-21.
- Clarke, Robert; Lancaster, Thomas (2014-04-13). "Using Turnitin as a tool for attribution in cases of contract cheating". Retrieved 2014-10-28.
- Wallace, M.J. and Newton P.M. 2014. Turnaround time and market capacity in contract cheating. Educational Studies. 40(2) 233-236.