1993
DOI: 10.1136/bmj.306.6885.1127
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Unpublished data in drug advertisements.

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citations
Cited by 3 publications
(4 citation statements)
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“…The impact and prestige of references in respected peer reviewed journals are well known to marketing departments, and it seems unlikely that companies would wish to suppress or restrict the publication of findings that expressly support the claims made in their advertisements. My findings therefore add support to Massam's suggestion that “there are many more studies done than can ever find space for publication”5 and Humphreys's view that “most editors of refereed journals are unwilling to publish the results of therapeutic trials sponsored by pharmaceutical companies.”2 I plan a further study of a larger number of advertisements to see if further light can be cast on this subject.…”
supporting
confidence: 63%
See 1 more Smart Citation
“…The impact and prestige of references in respected peer reviewed journals are well known to marketing departments, and it seems unlikely that companies would wish to suppress or restrict the publication of findings that expressly support the claims made in their advertisements. My findings therefore add support to Massam's suggestion that “there are many more studies done than can ever find space for publication”5 and Humphreys's view that “most editors of refereed journals are unwilling to publish the results of therapeutic trials sponsored by pharmaceutical companies.”2 I plan a further study of a larger number of advertisements to see if further light can be cast on this subject.…”
supporting
confidence: 63%
“…EDITOR, - After Harrington's criticism of the use of unpublished data in drug advertisements1 and Humphreys's response2 I surveyed advertisements in the BMJ during 1993 to discover more about where drug studies are published. I analysed 48 advertisements, which contained 175 references.…”
mentioning
confidence: 99%
“…This study followed a qualitative methodology based on semistructured interviews with professional pianists, thus extending previous phenomenological research on music memorisation (Aiello, 2000;Chen, 2015;Ginsborg, 2000;Hallam, 1997;Holmes, 2005;Humphreys, 1993). The methodological approach followed the Interpretative Phenomenological Analysis (IPA) protocol proposed by Smith et al (2009).…”
Section: Methodsmentioning
confidence: 99%
“…The reason for using a tobit estimation stems from the fact that several farmers declared that they had not borrowed from informal lenders, but this information may be voluntarily underreported: not all the borrowers may want to disclose that they resorted to informal credit to the interviewer (an officer of the World Bank). Therefore, running tobit regressions-censored at 0-on the whole dataset is a better strategy than deleting the households declaring no informal borrowing (García and Labeaga 1996;Humphreys 2013).…”
Section: Endogeneitymentioning
confidence: 99%