UNECE-UNODC Meeting on Crime Statistics, January 2006 Session 4: Dissemination of crime victim data Results from the UNECE-UNODC questionnaire on victim surveys Philippe Lamon UNODC

Overview Comparability of results Comparability of results Margin of error Margin of error Availability of data and dissemination Availability of data and dissemination

Were the results of the survey compared with data on crimes reported to the police? SurveysCountries Yes2228%1753% No5064%2681% No answer 68%516% Total78100%32

Rates per population of selected crimes 436 data are given on 1660 possible data (26%)

Rates per population of selected crimes Problems: Problems: - Period reference ? - Period reference ? - Comparability ? - Comparability ? - per household or per owner ? - per household or per owner ? = 0.09% or 9% ? = 0.09% or 9% ? - etc. - etc.

If the survey results have been made public, what margin of error was adopted in presenting the results? 33 relevant information in 78 surveys (42%)

Types of margin of error Relevant information % of all surveys ‘Over 25% are considered unreliable’ 618%8% Different according to the data (groups, territory level, etc.) 26%3% 95% confidence interval 1442%18% Not enough specific (published with S.E., etc.) 39%4% Other (0.03, 0.15, 1-2%, 0.035) 824%10% N/A57% Total33100%78100%

Margin error adopted by the ICVS

Is there a public use microdata file? SurveysCountries Yes3140%1650% No4355%2372% No answer 45%39% Total78100%32

Are survey results available on internet? SurveysCountries Yes5165%2578% Not available yet 34%39% No2228%1856% No answer 23%26% Total78100%32

Were printed reports published with the results of the surveys? SurveysCountries Yes4766%2991% Yes, as part of the ICVS analysis 57%413% No2228%1444% No answer 45%39% Total78100%32

Conclusion (1) Comparability of the data 1. with police data 28% of surveys but 53% of countries (63% of surveys in 88% of countries in dark figure/unreported crime, but only 28% of surveys compare with police data) 2. with other surveys: lack of comparison Comparability of the data 1. with police data 28% of surveys but 53% of countries (63% of surveys in 88% of countries in dark figure/unreported crime, but only 28% of surveys compare with police data) 2. with other surveys: lack of comparison

Conclusion (2) Comparison of data collected between different surveys? Possible if at least: - same methodology - same reference population, rates per owner/pop, etc. Possible in two ways for international comparison: - ICVS - comparison of two surveys (complicated) Comparison of data collected between different surveys? Possible if at least: - same methodology - same reference population, rates per owner/pop, etc. Possible in two ways for international comparison: - ICVS - comparison of two surveys (complicated)

Conclusion (3) Margin of error Should we propose a model? Margin of error Should we propose a model?

Conclusion (4) Dissemination of results 1. on internet (65% of surveys, 78% of countries) = good 2. printed version (67% of surveys, 94% of countries) = ok for countries, lack of finalization for surveys Dissemination of results 1. on internet (65% of surveys, 78% of countries) = good 2. printed version (67% of surveys, 94% of countries) = ok for countries, lack of finalization for surveys

Thank you