Were Newspapers More Interested in pro-Obama Letters to the Editor in 2008? Evidence from a Field Experiment.

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Suggested citation: 

Butler, Daniel M. & Emily Schofield (2010), Replication materials for ‘Were Newspapers More Interested in pro-Obama Letters to the Editor in 2008? Evidence from a Field Experiment.’ http://hdl.handle.net/10079/bzkh1nf. ISPS Data Archive.


Emily Schofield, Daniel Butler

Research design: 
Data type: 
Data source(s): 


Data source information: 


Field date: 
October 10, 2008
Field Date: 
2008-10-20 - 2008-10-21
Location details: 
United States - National
Unit of observation: 
Sample size: 
We limited our sample to the set of newspapers with a daily circulation of more than 100,000, as listed in the 2005 edition of Bacon’s Newspaper Directory… The initial subject pool consisted of 116 newspapers nationwide, but was then narrowed down to our final sample size of 100 because of factors that mandated exclusion of certain papers including bankruptcy of the newspaper since 2005, papers printed primarily in a foreign language, or data coding problems such as returned to sender submissions of letters.
Randomization procedure: 
After each newspaper was randomly assigned into one of the two treatments, the appropriate letters were submitted via email and online submission forms on Monday, October 20, and Tuesday, October 21, 2008.
We randomized whether the letter to the editor they received was pro-Obama or pro-McCain.
Treatment administration: 
Email and online forms.
Outcome measures: 
Whether the newspaper was interested in publishing the letter.
Archive date: 
Butler, Daniel M. & Emily Schofield
Owner contact: 


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Data file numbersort descending Description File format Size File url
D023F01 Dataset Stata (10.0) .dta 30925 Download file
D023F02 Dataset Excel .csv 19558 Download file
D023F03 Program file Stata (10.0) .do 3072 Download file
D023F04 Program file R (2.9.1) .R 14438 Download file
D023F05 Output file Adobe Acrobet (8.1) .pdf 64102 Download file
D023F08 Metadata (DDI 3.2) .xml 116163 Download file