Why it is important to include unpublished data in systematic reviews?

It is known that studies with statistically significant results have a higher probability to be published (publication bias). Moreover, unpublished data may also refer to information that are not included in study reports published in scientific journals but that may be important to estimate study out- comes.

What is unpublished data in statistics?

Answer: Unpublished Sources: The statistical data needn’t always be published. There are various sources of unpublished statistical material such as the records maintained by private firms, business enterprises, scholars, research workers, etc. They may not like to release their data to any outside agency.

What is published and unpublished sources?

U.S. Copyright Law defines publication as: Generally, publication occurs on the date on which copies of the work are first made available to the public. Unpublished works are those which have not been distributed in any manner.

What is an unpublished primary source?

Unpublished primary sources are original documents and artifacts of all kinds that were created by individuals but not published (that is, made public –issued in a format that could be widely distributed) during the period you are studying.

What is the difference between published and unpublished thesis?

As I understand the terminology in the area, dissertation or thesis, submitted to ProQuest (or another scholarly database, for that matter) is referred to as published. On the other hand, the same document, submitted to university’s e-repository or similar archive, is referred to as unpublished.