By Transparency International

Despite international standards and collective commitments, the world’s biggest economies and some key financial hubs remain far too open to corrupt people and other criminals laundering and enjoying their ill-gotten gains through real estate.

To help policymakers address these ongoing challenges, Transparency International and the Anti-Corruption Data Collective (ACDC) developed the Opacity in Real Estate Ownership (OREO) Index. The Index evaluates the ideal framework to protect real estate markets from dirty money, using two pillars. The first pillar assesses the availability and adequacy of real estate data. The second measures the coverage and scope of the anti-money laundering legal framework as it applies to the real estate sector.

The first edition of the index reveals gaps that make global property markets vulnerable to corrupt money flows through assessing and ranking 24 jurisdictions, including 18 G20 member nations plus guest countries Spain and Norway, as well as Hong Kong, Panama, Singapore and the United Arab Emirates (UAE).

No country achieves a perfect mark, with 10 jurisdictions scoring below five out of possible 10 points.

By exposing weaknesses, the OREO Index aims to drive reforms that enhance transparency and accountability in the real estate sector. Both an effective data system and comprehensive anti-money laundering safeguards are essential for effectively preventing, detecting and investigating money laundering, and identifying policy gaps that allow it to go undiscovered.

Berlin: Transparency International, 2025. 49p.

By CSE Aware

  The United Nations and other experts have highlighted that women with learning disabilities (LDs) are at higher risk of experiencing gender-based violence (GBV) because of the lifelong isolation, dependency and oppression they often they experience. These inequalities also put them at risk of commercial sexual exploitation (CSE). Despite global recognition of these impacts, in Scotland to date there is very limited evidence and information on how commercial sexual exploitation affects women with learning disabilities. In the recent report Unequal, Unheard, Unjust: But not Hidden Anymore,the Scottish Commission forPeoplewithLearningDisabilities (SCLD) highlighted SEason of the types of GBV women with learning disabilities experienced. What’s more, this groundbreaking report specifically recommended that the Scottish Government “commission national research examining the commercial sexual exploitation of women with learning disabilities in Scotland,” noting the lack of documented information. While some information does exist about learning disabled women’s experiences of selling or exchanging sex, it is mostly anecdotal and has not been documented nor analysed to truly understand the effects on this population and the effectiveness of, andgaps in, service responses.The present report was born from therecognition that there is a significant knowledge gap on the issue of CSE and its intersection with this particularly vulnerable group of women. Whilst the present report is not the much needed full-scale research which SCLD and ourselves are calling for (see recommendations), it does provide initial findings and recommendations from the exploratory researchweconductedoverthecourseofthreemonths. The Aims Of This research were to: Collect and document evidence of learningisabledwomen’sexperiencesof sellingorexchangingsex. Understandthedynamicsofwomen’s involvement and their specific needs. Explore service responses and challenges and opportunities when addressing women's experiences and needs. Produce Initial Recommendations thattheScottishGovernment and organisations canuseas abasis to design service and policy responses that meet theneeds women with LDs impacted byCSE.

Glasgow: CSE, 3035. 32p.

By Gustavo J. Bobonis and Anke Kessler

To what extent can anti-corruption measures serve to limit patronage and corrupt networks effectively and sustainably in clientelist societies with a prevailing norm of corruption? We develop a political agency model in which office holders are motivated to reduce rent seeking behavior through re-election incentives operating via elections and audits (formal institutions), but also through reputational or self-image concerns that are influenced by the prevailing norm on corruption in their peer group (informal institutions). We show that, while the formal institutions of audits and elections have the desired direct effect of reducing corruption, they also affect informal rules of conduct, which can have unintended effects. In particular, in clientelist societies with high levels of corruption, the social concerns work in opposition to formal incentives provided by anti-corruption efforts. Applying the theory to data from Puerto Rico’s anti-corruption municipal audits program, we find evidence consistent with the idea that anticorruption measures are less effective due to social spillovers.

CESifo Working Paper No. 11715, Munich: Munich Society for the Promotion of Economic Research - CESifo GmbH, 2025.

By Joseph R Friedman, Daniela Abramovitz, Britt Skaathun, Gudelia Rangel, Alicia Harvey-Vera, Carlos F Vera, Irina Artamonova, Sheryl Muñoz, Natasha K Martin, William H Eger ...

Background

Illicitly manufactured fentanyl (IMF) increases overdose mortality, but its role in infectious disease transmission is unknown. We examined whether IMF use predicts hepatitis C virus (HCV) and human immunodeficiency virus (HIV) incidence among a cohort of people who inject drugs (PWID) in San Diego, California and Tijuana, Mexico.

Methods

PWID were recruited during 2020–2022, undergoing semi-annual interviewer-administered surveys and HIV and HCV serological rapid tests through 2024. Cox regression was conducted to examine predictors of seroconversion considering self-reported IMF use as a 6-month lagged, time-dependent covariate.

Results

Of 398 PWID at baseline, 67% resided in San Diego, 70% were male, median age was 43 years, 42% reported receptive needle sharing, and 25% reported using IMF. HCV incidence was 14.26 per 100 person-years (95% confidence interval [CI]: 11.49–17.02), and HIV incidence was 1.29 (95% CI: .49–2.10). IMF was associated with HCV seroconversion, with a univariable hazard ratio (HR) of 1.64 (95% CI: 1.09–2.40), and multivariable HR of 1.57 (95% CI: 1.03–2.40). The direction of the relationship with HIV was similar, albeit not significant (HR 2.39; 95% CI: .66–8.64).

Conclusions

We document a novel association between IMF and HCV seroconversion among PWID in Tijuana–San Diego. Few HIV seroconversions (n = 10) precluded our ability to assess if a similar relationship held for HIV. IMF's short half-life may destabilize PWID—increasing the need for repeat dosing and sharing smoking materials and syringes. New preventive care approaches may reduce HCV transmission in the fentanyl era.

Clinical Infectious Diseases, cia e372, 2024.

By  Susan Olzak

Scholars document that attitudes toward guns and gun policy reflect deeply entrenched cultures that overlap with ideological affiliations and party politics. Does exposure to dramatic events such as school shootings and protests regarding gun control affect these patterns? I first argue that school shootings are significant triggering events that will become associated with attitudes favoring gun restrictions. The second argument holds that rising protests by one’s opponent can be transformed into mobilizing opportunity by a focal group. To examine these ideas, I combine information from a national exit poll data on respondents’ attitudes on gun policy with state-level information on the counts of recent school shootings, gun-policy protest, existing laws restricting gun use, and membership in the National Rifle Association. To minimize bias, the analysis of public opinion applies Coarsened Exact Matching techniques followed by analysis using mixed-level logit. The second analysis uses data on gun control protests, school shootings, and NRA memberships in states over time. Results show that conservatives (but not liberals) exposed to more school shootings favor more restrictive gun policies. The second, longitudinal analysis found that there is a significant interaction effect between increases in school shootings and gun control protests that diminishes NRA memberships significantly.

Unpublished paper. 2022. 49p.

By The World Economic Forum

In a complex cyberspace characterized by geopolitical uncertainties, widening cyber inequity and sophisticated cyberthreats, leaders must adopt a security-first mindset. While the 2024 edition of the Global Cybersecurity Outlook highlighted the growing inequity in cyberspace, this year’s report shines a light on the increasing complexity of the cyber landscape, which has profound and far-reaching implications for organizations and nations. This complexity is driven by a series of compounding factors: – Escalating geopolitical tensions are contributing to a more uncertain environment. – Increased integration of and dependence on more complex supply chains is leading to a more opaque and unpredictable risk landscape. – The rapid adoption of emerging technologies is contributing to new vulnerabilities as cybercriminals harness them effectively to achieve greater sophistication and scale. – Simultaneously, the proliferation of regulatory requirements around the world is adding a significant compliance burden for organizations. All of these challenges are exacerbated by a widening skills gap, making it extremely challenging to manage cyber risks effectively.

Geneva, SWIT: World Economic Forum , 2025. 49p.

By The United Nations Office on Drugs and Crime (UNODC)

Three Key Questions ♦ How are the activities of law enforcement agencies impacted by climate change and what are the implications of this for future practice? ♦ What capacities and organisational attributes are required by law enforcement agencies in responding to the challenges posed by climate change and environmental degradation? ♦ What improvements can be made to law enforcement responses to the challenges posed by climate change and environmental degradation? Legal and Professional Contexts ♦ Crimes that affect the environment are increasingly being prioritised by the United Nations and other international bodies, as well as regional and domestic authorities. ♦ A paradigm shift is occurring due to changing circumstances that is reshaping contemporary responses to the law enforcement mission and mandate. This has ramifications for how law enforcement work is carried out, the resources needed to do so, and the collaborations required across agencies and between community and government. Crimes that Affect the Environment and Climate Change ♦ Crimes that Affect the Environment Contributing to Climate Change Deforestation – diminishment of carbon sinks, adding to carbon emissions; Illegal mining – air pollution; polluting freshwater systems, Wildlife trafficking – loss of certain species and individuals may undermine the functioning of ecosystems exacerbating conditions leading to climate change; Land grabs and changing land uses – lost carbon stock and sequestration, adding to carbon emissions. ♦ Climate Change Affecting Existing Categories of Crime Water crimes – resource scarcity and water theft; Clandestine migration – climate refugees; Illegal mining – rare earth minerals for new renewable energy systems; Social conflict – aggression and violence over scarce resources, social strains arising from biophysical changes, changes in routine activities depending on weather. ♦ Cross-Over Crimes Associated with Crimes that Affect the Environment and Climate Change Homicide – killing of park rangers, environmental activists, local residents; Organised crime groups and networks – fraudulent green investments, low-price food on-sales; Corruption – direct (criminal such as document fraud) and moral (unethical policies and practices that foster carbon emission pollution); Disaster-related fraud – building practices, insurance claims, victim scams and identity theft. Climate Change Risks and Disasters ♦ The planet is heating up at an unprecedented rate and this is accelerating. The effects of this are manifest in high impact and extreme weather events and increases in all manner of risks and harms. This is global in nature. ♦ The notion of harmscape captures the idea of intersecting and interacting harms. Climate change impacts and risks are becoming increasingly complex and more difficult to manage. ♦ The intersectional dimensions of responding to climate disruption include three main features: climate related crimes (e.g., water theft); climate-related events (e.g., wildfires); and climate-related problems (e.g., prolonged homelessness), all of which are interconnected. Capacities and Capabilities of Law Enforcement Agencies ♦ While there may be rising interest and need for greater law enforcement intervention arising from climate-related events and trends, at present there is generally insufficient capacity to meet the challenges of either crime fighting or disaster and emergency management. ♦ A change in and pluralisation of police roles is occurring, in which greater attention is being devoted to matters such as climate change mitigation, reduction of climate-related crime or first responder work on the frontline of environmental disasters. ♦ There are a multitude of stakeholders and agencies with which law enforcement must engage and collaborate with, with numerous tensions and opportunities evident at the grassroots level with regard to state-community relations. A New Paradigm for Global Law Enforcement ♦ A robust response to climate-related crime and disaster events hinges to a large extent on the strength and resilience provided by the community and NGO sectors working in conjunction with state authorities. ♦ A wide range of equipment and technologies are required in the fight against climate-related crimes and in responding to disasters and emergencies. These need to be shared out at the global scale. ♦ Information management systems are crucial to both combating climate-related crimes as well as predicting and responding to climate-related disasters and their short- and long-term social and environmental consequences. ♦ It is vital that multi-agency and multi-disciplinary teams and forums be provided that bring together in a coordinated manner the knowledge, expertise and experience of a wide range of practitioners. ♦ A range of strategic actions are required for effective environment and climate-related global law enforcement. The emphasis must be on preparedness and rapid mobilisation of human and technical resources.

Vienna: UNODC, 2024. 70p.

By Susie Hulley and Tara Young

OWHRs were introduced under the Police, Crime, Sentencing and Courts Act 2022 to address concerns that existing statutory homicide reviews were not formally capturing information about the ‘growing proportion’ of homicides involving offensive weapons. Like other homicide reviews, the purpose of OWHRs is to help national and local agencies understand the causes of serious violence, to better prevent homicides involving offensive weapons and ‘save lives’.

Authors Dr Susie Hulley and Dr Tara Young examine the potential benefits and risks of OWHRs, particularly in regards to young adult safety. Young adults (18- to 25-year-olds) were identified as overlooked by existing homicide reviews, and as such were considered a priority for OWHRs. 

They identify the potential benefits as:

• Serving a symbolic function to victims’ families and the wider community of the Government’s commitment to taking offensive weapon-related homicides seriously.

• Providing a victim’s family and friends with additional information about a homicide.

• Offering valuable local and national data about offensive weapon homicides involving young adults that is not currently available.

• Having the potential to help local and national agencies develop policies and practices to address weapon-related homicide among young adults.

However, there are also some potential risks:

• OWHRs may not be effective, as evidence suggests that existing homicide reviews have not reduced homicide rates.

• Local and national agencies may not engage with or act on the findings from OWHRs, particularly given the lack of a statutory duty.

• 'Hindsight bias’ may be applied by OWHR panels.

• 'Selection bias'  may generate misinformation about offensive weapon homicides and potentially reinforce existing racialised stereotypes. 

While the report does urge the government to instead consider well-evidenced interventions, it also provides five recommendations that could mitigate some of the risks, if OWHRs are to be rolled out.

London: Centre for Crime and Justice Studies, 2025. 27p.   

By Anneli Botha

Transnational organised crime is at the heart of the illicit extraction and smuggling of natural resources in Mozambique’s Cabo Delgado province. Is there evidence that insurgents are capitalising on the extraction of natural resources to radicalise and recruit new members, legitimise and justify their existence and attacks, or finance their activities? In the absence of interviews with militants, this study reflects on the views of community members living in areas where natural resources are extracted, and insurgents operate. Key points • Mozambique’s government needs to consider a more effective information campaign to get ahead of incorrect perceptions insurgents could capitalise on. • Words should be followed by action addressing the disparity between expected financial growth following the discovery of natural resources and the reality on the ground. • Despite efforts from extraction companies to build community relations, more is needed to address negative perceptions and strengthen community resilience through efforts to make locals more employable. Piecemeal efforts are not going to be enough

Research Paper  Centre for Crime and Justice Studies, 2025. 26p.

By Ndubuisi Christian Ani, Feyi Ogunade and John Kamma 

Gangsterism in Liberia lies at the intersection of a society ravaged by civil war, a declining economy, social exclusion of a bulging underclass, collusion between state officials and illicit markets, and inefficient law enforcement. For youths, gang involvement offers a sense of belonging, a surrogate family structure, and a means of protection and economic benefits. Gangs are also available for hire by politicians, criminal networks and business people seeking to intimidate their opponents or protect properties. Key recommendations • A policy against gangsterism and criminal groupings is urgently needed in Liberia. A comprehensive policy would offer opportunities for a holistic response that involves the improved provision of public services, including enhanced law enforcement, in communities. • Youth-focused development is a critical priority for addressing the causes of gang violence and drug abuse in Liberia. Without discounting the importance of quick-impact youth empowerment initiatives, development programmes need to be long-term. • Schools should have drug prevention programmes. • International support could help Liberia establish treatment and rehabilitation centres to address substance abuse and criminality. • The Economic Community of West African States and African Union should establish a joint task force with Liberia, Sierra Leone and Guinea to disrupt kush production points Research Paper and supply chains  

ENACT Africa, 2025. 28p.

By Nicola Helps, Charlotte Bell, Chloe Schulze, Rodney Vlais, et al.

While men’s behaviour change programs (MBCPs) were never meant to be a panacea for domestic, family and sexual violence, their role and effectiveness in addressing domestic, family and sexual violence is often questioned.

This evidence brief provides a summary of the literature on MBCPs, focusing primarily on their role in addressing domestic, family and sexual violence in Australia. It synthesises what is known about MBCPs based on available peer-reviewed and grey literature and practice-based evidence.

A shared understanding of the role and capability of MBCPs is critical for their impact. Expecting significant, transformational change from a single intervention is unrealistic. There is now a growing appreciation and understanding that MBCPs are one piece of the puzzle in a wider system of accountability for people who use violence. Yet the potential outcomes from such collaborative practice are often limited or undermined by how MBCPs have been implemented, or by inadequacies in the broader systemic infrastructure upon which the intended behavioural change relies.

Key findings

• MBCPs are conceptualised as one piece of the puzzle however are yet to be operationalised as part of a fully integrated system.

• MBCPs need to be better funded to provide tailored, holistic and timely services that can support meaningful behaviour change.

• MBCPs need to be embedded collaboratively within the broader domestic, family and sexual violence ecosystem so they can work together with other services towards improved outcomes for victims and survivors including children, as well as improved outcomes for meaningful behaviour change, accountability, increased visibility and risk management.

• MBCPs are only one piece of the response to domestic, family and sexual violence.

Alexandria, NSW: Australia’s National Research Organisation for Women’s Safety Limited (ANROWS), , 2025. 35p.

By Public Safety Canada

The National Strategy to Combat Human Trafficking (National Strategy) is a five-year (2019-2024) strategy aiming to strengthen Canada’s response to human trafficking. It follows from the National Action Plan to Combat Human Trafficking which expired in 2016. The National Strategy is a whole of government endeavour that aligns efforts with the internationally recognized pillars of prevention, protection, prosecution and partnership. Canada has added a fifth pillar, empowerment, to enhance support and services to victims and survivors of human trafficking. The activities under the pillars are the responsibility of many partner departments and agencies. Several partner departments and agencies received funding for activities specific to the National Strategy. These include, Public Safety Canada (PS), the Canada Border Services Agency (CBSA), the Financial Transactions and Reports Analysis Centre (FINTRAC), Women and Gender Equality (WAGE) Canada, Immigration, Refugees and Citizenship Canada (IRCC), and Public Services and Procurement Canada (PSPC). Other departments and agencies supported efforts under the National Strategy with pre-established funding. These partners are the Royal Canadian Mounted Police (RCMP), Global Affairs Canada (GAC), Justice Canada (JUS), and Employment and Social Development Canada (ESDC). Additionally, Statistics Canada (StatsCan) receives funding from PS for activities that support the National Strategy, including data collection and research projects.

The purpose of the evaluation was to assess the relevance, effectiveness and efficiency of the National Strategy. The evaluation covered the period from fiscal year 2019-2020 to 2022-2023 and was conducted in accordance with the Treasury Board Policy on Results and the Directive on Results.    

Ottawa: Public Safety Canada 2024. 50p

By Coen Teunissen, Isabella Voce and Russell G Smith

This report estimates the cost of pure cybercrime to individuals in Australia in 2019. A survey was administered to a sample of 11,840 adults drawn from two online panels—one using probability sampling and the other non-probability sampling—with the resulting data weighted to better reflect the distribution of the wider Australian population.

Thirty-four percent of respondents had experienced some form of pure cybercrime, with 14 percent being victimised in the last 12 months. This is equivalent to nearly 6.7 million Australian adults having ever been the victim of pure cybercrime, and 2.8 million Australians being victimised in the past year.

Drawing on these population estimates, the total economic impact of pure cybercrime in 2019 was approximately $3.5b. This encompasses $1.9b in money directly lost by victims, $597m spent dealing with the consequences of victimisation, and $1.4b spent on prevention costs. Victims recovered $389m.

Statistical Bulletin no. 34.

Canberra: Australian Institute of Criminology, 2021. 15p.

By Patrick Lussier and Evan McCuish

Objectives

There is empirical evidence that sexual recidivism rates have been dropping for several decades, but it remains unclear whether this drop is an artifact of changing research methodologies over the years. The current study, therefore, examines whether the sexual recidivism drop is robust while accounting for various methodological factors.

Method

The study is based on a systematic review and a quantitative meta-analysis of 468 empirical studies published between 1940 and 2019 that reported sexual recidivism rates. A total of 626 estimations (n = 388,994) of sexual recidivism were retrieved for the study period and of those, 238 were independent observations (n = 196,651). A series of sensitivity analyses were conducted using a meta-regression approach.

Results

A series of meta-regression analyses show that, even after accounting for various methodological factors (e.g., study settings, follow-up length, recidivism criteria), there has been a sexual recidivism rate drop of about 45–60% since the 1970s.

Conclusions

The study findings confirm the presence of a sexual recidivism drop while recognizing that sexual recidivism rates are sensitive to methodological details.

Journal of Criminal Justice

Volume 92, May–June 2024, 102188, p. 16

By United Nations Office on Drugs and Crime, UN Women

In this publication, the term “femicide” is used to refer to all types of gender-related killings of women and girls as described in the “Statistical framework for measuring the gender-related killing of women and girls (also referred to as “femicide/feminicide”)”.

Globally, approximately 51,100 women and girls were killed by their intimate partners or other family members during 2023. Higher than the 2022 estimate of 48,800 victims, this change is not indicative of an actual increase as it is largely due to differences in data availability at the country level. The 2023 figure means that 60 per cent of the almost 85,000 women and girls killed intentionally during the year were murdered by their intimate partners or other family members. In other words, an average of 140 women and girls worldwide lost their lives every day at the hands of their partner or a close relative...

P.18 When considering possible risk factors, it should be noted that fewer victims (11 per cent) and perpetrators (20 per cent) of femicides are under the influence of alcohol than in the case of male homicides (25 and 30 per cent respectively). Some studies point to the drug intoxication of victims as a homicidal risk factor,13 but in the case of femicides in France, this does not seem to be the case, with 3 per cent of victims and 5 per cent of perpetrators of femicide being under the influence of drugs at the time of the crime.

Vienna: UNODC, 2024. 36p.

By William Downs

The Labour government has committed to halving knife crime in a decade.

This briefing provides an overview of legislation concerning knives and offensive weapons, and the approaches taken by the police and other agencies to prevent serious violence in England and Wales.

What are knife crime offences? It is a criminal offence to possess any knife or other bladed article in a public place, under section 139 of the Criminal Justice Act 1988. It is also a criminal offence to have an “offensive weapon” in any public place, under section 1 of the Prevention of Crime Act 1953. Both offences carry maximum penalties of up to four years’ imprisonment. It is a defence for someone to prove they have possessed a knife, bladed article or offensive weapon with “good reason or lawful authority”, though the legislation does not provide examples of what this means in practice. A court determines whether the explanation provided by a defendant amounts to lawful authority or reasonable excuse based on the specific circumstances of a case. It is also a criminal offence to possess any prohibited weapon under section 141 of the Criminal Justice Act 1988 (as amended by the Offensive Weapons Act 2019). Prohibited weapons cannot be possessed anywhere, even in private, and are also illegal to hire, lend or manufacture. Like other possession offences, the maximum penalty is four years’ imprisonment. There are currently 20 prohibited weapons listed in secondary legislation under the Criminal Justice Act 1988 (Offensive Weapons) Order 1988, including a range of knives, bladed articles and other weapons. Under section 141(2) of the 1988 act, the government can introduce secondary legislation to add further weapons to this list. In 2024, the government added a new definition of “zombie-style” knives and machetes to the list, and launched a consultation on adding “ninja swords” to the list. Sentencing statistics from the Ministry of Justice shows that in the year ending March 2023, there were almost 18,500 cautions and convictions made for possession of a knife or offensive weapon. Juveniles (aged 10-17) were the offenders in around 17.3% of cases. Further data for England and Wales related to knife-related offences can be found in the Library briefing: Knife Crime Statistics: England and Wales.

London: House of Commons Library, 2025. 41p.

By Danielle Stibbe, Stijn Ruiter, Wouter Steenbeek, Asier Moneva

Objectives: This study investigates the effect of advertised rewards in credential leaks on the likelihood and speed of account hijacking. Methods: In an online field experiment, we created 176 honey Gmail accounts and randomly assigned them to eight different posts containing account credential leaks. We used a 2 × 2 experimental design, manipulating two key variables within the post titles: the number of accounts (5 K or 1.5 M) and the promise of access to additional platforms (absent or present). We then monitored the accounts for any subsequent activity. Results: Our findings indicate that the promise of access to additional platforms increased the likelihood and speed of an attempted access. Only 12 accounts were fully accessed, however, because most hijackers did not complete the second-factor authentication (2FA) process required for gaining full access. It seems that the 2FA acted as a deterrent to complete Gmail account hijacking. Conclusions: The study aligns with the rational choice perspective of crime, showing that the prospect of greater rewards leads to more attempted account accesses

Computers in Human Behavior Reports, Volume 14, May 2024, 100410

By Wim Bernasco*, Marre Lammers, Barbara Menting, Stijn Ruiter

The interpretation of research findings based on self-reported delinquency requires knowledge of how response rates depend on the attributes of potential respondents, including their prior offending. The purpose of the present study was to quantify the extent to which, in a sample of offenders, the two main determinants of non-response – non-contact and refusal – depend on prior offending frequency. We used binomial and multinomial regression models to assess whether frequent offenders are more difficult to contact and less willing to participate in online surveys. These hypotheses are tested on a sample of offenders who were invited by regular mail to participate in the Online Activity Space Inventory Survey (OASIS), an online survey on mobility and safety. Controlling for gender and age as potential confounders, our findings do not confirm that frequent offenders are less likely to be successfully contacted, but they do confirm that, if contacted, they are less likely to participate. Response rates in offender-based research are selective and thus potentially biased towards infrequent offenders. They generally favour conservative estimates and conclusions, implying that any associations found between crime and its predictors are likely stronger in reality.

European Journal of Criminology, Volume 19, Issue 6, November 2022, Pages 1403-1420

By Barbara Menting, Marre Lammers, Stijn Ruiter*, Wim Bernasco

Crime pattern theory predicts that offenders commit offences in their activity spaces. We also propose that they most likely offend in the more frequently visited parts. Previous studies used offenders' residential areas or other activity space proxy measures but lacked data on other routinely visited places (e.g., work, school, and leisure activities). A major contribution of this study is the use of an online survey in which 78 offenders reported on their own activity spaces and committed offences (n = 140). Results show that offending is much more likely in offenders' activity spaces than elsewhere, and effects increase with visiting frequency. Although residential area is a good predictor, offenders' more extensive self-reported activity spaces predict much better where they commit offences.

The British Journal of Criminology, Volume 60, Issue 2, March 2020, Pages 303–322,

By Nick Van Doormaal, A.M. Lemieux, Stijn Ruiter, Paul M.R.R. Allin, Craig R. Spencer

Many studies of wildlife poaching acknowledge the challenges of detecting poaching activities, but few address the issue. Data on poaching may be an inaccurate reflection of the true spatial distribution of events because of low detection rates. The deployment of conservation and law enforcement resources based on biased data could be ineffective or lead to unintended outcomes. Here, we present a rigorous method for estimating the probabilities of detecting poaching and for evaluating different patrol strategies. We illustrate the method with a case study in which imitation snares were set in a private nature reserve in South Africa. By using an experimental design with a known spatial distribution of imitation snares, we estimated the detection probability of the current patrol strategy used in the reserve and compared it to three alternative patrol strategies: spatially focused patrols, patrols with independent observers, and systematic search patterns. Although detection probabilities were generally low, the highest proportion of imitation snares was detected with systematic search strategies. Our study provides baseline data on the probability of detecting snares used for poaching, and presents a method that can be modified for use in other regions and for other types of wildlife poaching.

Oryx , Volume 56 , Issue 4 , July 2022 , pp. 572 - 580