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Street Violence and Media Empowerment: Evidence from Guatemala
Initial registration date
June 10, 2019
June 10, 2019 10:38 PM EDT
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Nova School of Business and Economics
Other Primary Investigator(s)
Navarra Center for International Development, University of Navarra
Additional Trial Information
Homicide is rampant in Latin America and the Caribbean. This project has a two-fold objective. First, it will provide evidence on the impact of an effort to protect at-risk youth in Guatemala through empowerment. This is implemented through a randomized individual-level intervention on the role of self-expression in shaping behavior among the youth living in areas festered with violence and lack of access to opportunities. For this purpose, the participation in a mass-media campaign will serve as main source of variation. Second, it aims to understand the role of media in the fight against gangs, by varying throughout the country the exposure to the mass-media among youth. To capture this, this project will exploit semi-random variation in the reception of radio and tv signals through topography, and random variation through social media.
Intervention Start Date
Intervention End Date
Primary Outcomes (end points)
Violent behavior, sense of belonging, aspirations, homicide rates
Primary Outcomes (explanation)
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
The evaluation design of the first component is a standard individual-level randomized controlled trial.
Experimental Design Details
Was the treatment clustered?
Sample size: planned number of clusters
Sample size: planned number of observations
1200 at-risk youths between 16 and 21 year
Sample size (or number of clusters) by treatment arms
400 individuals per treatment arm
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
This study proposes to have 1200 at-risk youth between the ages of 16 and 21 to be randomly allocated into one of three groups (T0, T1, T2). With 80 percent of statistical power and an alpha of 0.05, we could capture a minimum detectable effect of 0.2 of a standard deviation (as standard in randomized experiments) with 394 individuals per group. We therefore decide to have 400 individuals in each comparison group, which provides a power of 81 percent (alpha = 0.05). With cross-randomization, statistical testing could extend to 5 groups (T0, T1, T2 and cross-randomization within T1 and T2). This is in addition to test cross-randomized groups, for which previous calculations also apply. In this case, we would have 240 individuals in each comparison group. With 80 percent of statistical power and an alpha of 0.05, this allows capturing a minimum detectable effect of 0.26 of a standard deviation.
INSTITUTIONAL REVIEW BOARDS (IRBs)