Thought this was a good article in how it highlights the "positive bias" present in society. It's not so much that people discriminate in a negative fashion against others, as that they are more willing to "bend the rules" for those perceived to be "like them." And many may be doing it unconsciously.
Article:
http://www.nytimes.com/2015/02/24/opinion/research-shows-white-privilege-is-real.html
Paper 1:
http://ftp.iza.org/dp7300.pdf
Paper 2:
http://islandia.law.yale.edu/ayres/mujcic_frijters_busDec2014.pdf
New York Times said:As they describe in two working papers, Redzo Mujcic and Paul Frijters, economists at the University of Queensland, trained and assigned 29 young adult testers (from both genders and different ethnic groups) to board public buses in Brisbane and insert an empty fare card into the bus scanner. After the scanner made a loud sound informing the driver that the card did not have enough value, the testers said, I do not have any money, but I need to get to a station about 1.2 miles away. (The station varied according to where the testers boarded.)
With more than 1,500 observations, the study uncovered substantial, statistically significant race discrimination. Bus drivers were twice as willing to let white testers ride free as black testers (72 percent versus 36 percent of the time). Bus drivers showed some relative favoritism toward testers who shared their own race, but even black drivers still favored white testers over black testers (allowing free rides 83 percent versus 68 percent of the time).
The study also found that racial disparities persisted when the testers wore business attire or dressed in army uniforms. For example, testers wearing army uniforms were allowed to ride free 97 percent of the time if they were white, but only 77 percent of the time if they were black.
New York Times said:The bus study underscores this point. Drivers were more likely to let testers ride free when there were fewer people on the bus to observe the transaction. And the drivers themselves were probably not aware that they were treating minorities differently. When drivers, in a questionnaire conducted after the field test, were shown photographs of the testers and asked how they would respond, hypothetically, to a free-ride request, they indicated no statistically significant bias against minorities in the photos (86 percent said they would let the black individual ride free).
Article:
http://www.nytimes.com/2015/02/24/opinion/research-shows-white-privilege-is-real.html
Paper 1:
http://ftp.iza.org/dp7300.pdf
Paper 2:
http://islandia.law.yale.edu/ayres/mujcic_frijters_busDec2014.pdf