Institution for Social and Policy Studies

Advancing Research • Shaping Policy • Developing Leaders

Black Politicians Are More Intrinsically Motivated to Advance Blacks’ Interests: A Field Experiment Manipulating Political Incentives

ISPS Data Archive: Terms of Use

By using, contributing, and/or downloading files associated with scholarly studies available on the ISPS Data Archive, you agree to these terms and conditions.

Please read the ISPS Data Archive Terms of Use.


David E. Broockman

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


Data source information: 

Suggested citation: “Replication Materisla for, ‘Do Congressional Candidates Have Reverse Coattails? Evidence from a Regression Discontinuity Design.’;;;;;;; ISPS Data Archive.”

Field date: 
October 29, 2010
Unit of observation: 
State Legislators
Sample size: 
Gathered data on legislators’ races and email addresses in mid-2010 from public state legislative websites for all 50 states and sent every state legislator (N=6,928); 297 observations were dropped as the emails immediately bounced as undeliverable; Also excluded all 713 legislators like this Houston legislator who might have received letters via their colleagues by virtue of representing one of the 100 places with names I used to construct the treatments; all remaining 334 legislators in Georgia and Indiana were excluded because legislators in these states share staff, rendering it unclear to which legislator the replies should be credited. Resulting in 5,593 usable observations.
Randomization procedure: 
Randomly assigned each legislator to the in- and out-of-district treatment groups with block randomization on state, party, and race.
An email asking for help enrolling in state unemployment benefits. The emails all came from the alias Tyrone Washington, which strongly signals being black. Tyrone purported to live in, randomly, either a city in each legislator’s district or a city far from each legislator’s district.
Treatment administration: 
Email letter
Outcome measures: 
Whether received a reply; whether reply was helpful
Archive date: 
Archive contributor: 
Limor Peer
Owner contact: 


Terms of use: 

Academic, non-commercial; see ISPS Terms of Use;

Data file numbersort descending Description File format Size File url
D099F01 Data File Stata (12.0) .dta 803840 Download file
D099F02 Data File Excel 2010 .csv 1286144 Download file
D099F03 Data File Excel 2010 .xls 1574912 Download file
D099F04 Data File .txt 1096704 Download file
D099F05 Codebook DDI-XML 47104 Download file
D099F06 Program File Stata (12.0) .do 5120 Download file
D099F07 Program File R
D099F08 Note Adobe Acrobat (XI Pro) PDF 35840 Download file
D099F09 Metadata Record Adobe Acrobat (XI Pro) PDF 201728 Download file