Perceptions of Local Organized Criminality

Last registered on September 03, 2025

Pre-Trial

Trial Information

General Information

Title
Perceptions of Local Organized Criminality
RCT ID
AEARCTR-0016475
Initial registration date
August 29, 2025

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
September 03, 2025, 8:56 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Locations

Region

Primary Investigator

Affiliation
University of Naples Federico II

Other Primary Investigator(s)

PI Affiliation
University of Naples Federico II
PI Affiliation
University of Catania

Additional Trial Information

Status
In development
Start date
2025-08-05
End date
2025-09-30
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
We study how perceptions of the presence of organized crime at the local level influence citizens’ preferences for being tough on crime and their propensity to consider running for local office. We do so by fielding an online survey to a sample of 4000 Italian residents, representative of the Italian population in terms of geographic distribution and other demographic characteristics. In the survey we first measure respondents’ beliefs about the presence of organized crime. Then, we provide a random subset of respondents with accurate information on the presence of organized criminality in their province relative to other Italian provinces. Finally, we elicit respondents’ preferences for making punishment for organized crime harsher and for investing more private and public resources to fight organized crime. We also elicit their propensity to run for mayor.
External Link(s)

Registration Citation

Citation
Drago, Francesco, Giovanni Immordino and Armando Miano. 2025. "Perceptions of Local Organized Criminality." AEA RCT Registry. September 03. https://doi.org/10.1257/rct.16475-1.0
Experimental Details

Interventions

Intervention(s)
In an online survey of 4000 Italian residents, we study how perceptions of the presence of organized crime at the local level influence citizens’ preferences for being tough on crime and their propensity to run for local office. We start by measuring respondents’ beliefs about the presence of organized crime in the town where they live. We then provide half of respondents – randomly selected – with accurate information on the presence of organized criminality in the province where they live, relative to other Italian provinces. More precisely, we rank provinces using an index capturing the presence of organized criminality developed by De Luca (2025) et al. and based on crime data reported by the Italian Statistical Agency (ISTAT) and the Italian Ministry of Interior, and we group them into different quintiles of the distribution. We inform respondents whether the presence of organized criminality in their province is very low, low, average, high or very high relative to other Italian provinces based on this index – for provinces in the 1st, 2nd, 3rd, 4th, and 5th quintile respectively. We measure respondents’ perceptions of the presence of organized criminality in their province, to check for the effect of the treatment on beliefs. We then elicit respondents’ preferences for making punishment for organized crime harsher and for investing more private and public resources to fight organized crime. We also elicit their propensity to run for mayor, should their preferred political party ask them to do so.
Intervention (Hidden)
Intervention Start Date
2025-08-05
Intervention End Date
2025-09-30

Primary Outcomes

Primary Outcomes (end points)
Respondents’ beliefs about the presence of organized criminality in their town and province. Respondents’ beliefs about whether punishments for organized crime currently in place are adequate to act as a deterrent for criminals and to provide justice to the victims of organized crime. Respondents’ preferences for making punishment for organized crime harsher. Respondents’ preferences for spending more public money on fighting organized crime. Respondents’ willingness to pay in terms of higher income taxes for fighting organized crime. Respondents’ preferences for increasing oversight on public works to avoid infiltration by organized criminality. Respondents’ willingness to accept delays in public works to eliminate the risk of involving companies that have ties with organized crime. Respondents’ willingness to run for mayor of their town or of another town, should their preferred party ask them to do so.
Primary Outcomes (explanation)
Respondents’ beliefs and preferences are measured using 7-points likert scales ranging from “absolutely not/absolutely disagree” to “absolutely yes/absolutely agree”. We may transform these answers into dummy variables when we do the treatment effect analysis to improve power and interpretability.

Respondents’ wiliness to pay for fighting organized crime is measured using a slider going from 0% to 20% that they can use to select the higher income tax rate that they are willing to accept to increase public spending on fighting organized criminality. Respondents’ willingness to accept delays in public works to eliminate the risk of involving companies that have ties with organized crime is measured using a slider going from 0% to 20% more time to complete public works on average.

In addition to the standard treatment effect analysis on all the variables listed above, we also plan to explore the heterogeneity in the treatment effects by respondents’ socio-economic characteristics (such as gender, education, age), and crucially location – in particular, comparing location at lower and higher risk of organized criminality infiltration.

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We provide half of respondents in our sample – randomly selected – with accurate information on the presence of organized criminality in the province where they live, relative to other Italian provinces. More precisely, we rank provinces using an index capturing the presence of organized criminality developed by De Luca (2025) et al. and based on crime data reported by the Italian Statistical Agency (ISTAT) and the Italian Ministry of Interior, and we group them into different quintiles of the distribution. We inform respondents whether the presence of organized criminality in their province is very low, low, average, high or very high relative to other Italian provinces based on this index – for provinces in the 1st, 2nd, 3rd, 4th, and 5th quintile respectively.
Experimental Design Details
Randomization Method
Respondents are randomly assigned to the control or treatment group as they take the survey.
Randomization Unit
Individual respondent.
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
4,000 respondents
Sample size: planned number of observations
4,000 respondents, age between 18 and 75
Sample size (or number of clusters) by treatment arms
We are going to split respondents equally among the control and the treatment group. Hence, we expect to have about 2,000 respondents in each treatment arm.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
IRB Approval Date
IRB Approval Number

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
Data Collection Complete
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials