Inner cities with mixed ethnic groupings are an example.
What they show is that no party, no ethnic or religious grouping, can dominate government in Iraq.
In 2006 the largest minority ethnic grouping was Iraqi Kurds who were estimated at 3,000.
The study was done in 2000 and included all ethnic groupings.
This includes understanding government structure, the interests of elites, ethnic and religious groupings and economics.
"When they developed the so-called homelands, the idea was to have as many nations as major ethnic groupings."
National policy gives very little importance to ethnic grouping and information related to this issue is difficult to come by.
The tribal structures, the ethnic groupings - they matter to Iraqis.
First and foremost, the use of violence by certain ethnic groupings to impose their rule on other communities is unacceptable.
They are also limited to certain religious persuasions and ethnic groupings.