October 2006- John Hopkins Mortality Survey
The second study by researchers from the Johns Hopkins Bloomberg School of Public Health. It uses samples of casualties from Iraqi households to extrapolate an overall figure of 601,027 Iraqis dead from violence between March 2003 and July 2006. According to the researchers the new study is more representative and the sampling is broader: it surveyed 1,849 Iraqi families in 47 different neighborhoods across Iraq. The selection of geographical areas in 18 regions across Iraq was based on population size, not on the level of violence, they said.

Related Links
• The Report -PDF
• Human Cost of War (supplement to the study) -PDF
• An explanation of the methodology used in this and other surveys
• Huge gaps between Iraq death estimates- an analysis by Paul Reynolds of the BBC
• Mortality FAQ- a rebuttal to criticisms of the study and further explanation of methodology by the authors

2004- UNDP Iraq Living Conditions Survey
Reports and analyses the living conditions in Iraq as they were approximately one year after the change of regime in the country, as a result of the 2003 war. The dynamics of any population can be described in terms of births, deaths, and migration, and these topics are dealt with in this chapter, paying specific regard to the population’s age and gender structure.
This representative survey of 21,668 households is the first in recent years to cover all governorates in Iraq. The larger part of the survey took place in April and May 2004, while fieldwork in the governorates of Erbil and Dahouk was carried out in August 2004. 

• Survey Results
             Tabulation Report -PDF
             Analytical Report -PDF
             Socio-Economic Atlas -PDF

November 2004- John Hopkins Mortality Survey
A population-based field study published in The Lancet, one of Britain’s top medical journals, suggests the death toll in Iraq is far higher than previously reported. The survey estimates that Iraq has suffered 98,000 deaths -- in excess of Iraq's expected death rate based on pre-invasion mortality figures - in the 18 months since the U.S. invaded Iraq. An estimated 60,000 of those deaths are attributed to violence, mainly reported to be caused by US air attacks. The survey was conducted by researchers from the Johns Hopkins Bloomberg School of Public Health and Baghdad's Al-Mustansiriya University. 

related links:
• The Report -PDF
• A more detailed summary compiled by EPIC
• Our Interview with Richard Garfield of Columbia University, one of the lead authors the study
• Interview with Les Roberts, also a lead author, on “This American Life”