Studies in Law and Literature
The performance of results-based contracting in public outsourcing: a metaregression analysis
Principal Investigator: Omar Barroso Khodr Authors: Bel, Espaillat, and Esteve (2025) Original Title: The performance of performance-based contracting in public outsourcing: a meta-regression analysis Intervention Location: United States and United Kingdom. Sample Size: 740 observations Main Variable of Interest: Type of Intervention: Optimization in public policies Methodology: meta-analysis and meta-regression. Abstract Contracting […]
The impact of political leaders' social capital on the success of public policies: the case of local food systems.
Principal Investigator: Omar Barroso Khodr Authors: Noh et al. (2025) Original Title: The Impacts of Political Leaders' Social Capital on Policy Success: The Case of Local Food Systems Intervention Location: New York (USA) Sample Size: 185 municipal leaders. Main Variable of Interest: Access to food Intervention Type: Collaborative leadership among governments. Methodology: […]
Inequality in frontline communication: bureaucrats speak differently to men and women.
Principal Investigator: Omar Barroso Khodr Authors: Friedrich and Eckhard (2026) Original Title: Inequality in frontline communication: bureaucrats talk differently to men and women Intervention Location: Germany Sample Size: 20.000 statements made by 28 bureaucrats Main Variable of Interest: complexity and emotionality Type of Intervention: Impact assessment in public administration Methodology: Empirical statistics; […]
Is more specialization always better? Analyzing the impact of specialization in policymaking arenas on environmental policy compliance.
Principal Investigator: Omar Barroso Khodr Authors: Yuhao Ba Original Title: The more expertise the better? Examining the impact of policy venue specialization on environmental policy compliance Intervention Location: China Sample Size: 3.792 firms Main Variable of Interest: Misconduct. Indicating the number of reported cases of corporate environmental misconduct committed by the company […]
Does law enforcement style influence citizens' trust in regulatory agencies? An experiment in six countries.
Principal Investigator: Omar Barroso Khodr Authors: Stephan Grimmelikhuijsen, Marija Aleksovska, Judith van Erp, Sharon Gilad, Libby Maman, Tobias Bach, Moritz Kappler, Wouter Van Dooren, Rahel M. Schomaker, Heidi Houlberg Salomonsen Original Title: Does enforcement style influence citizen trust in regulatory agencies? An experiment in six countries Intervention Location: Belgium, Denmark, Germany, Israel, Countries […]
Whose voices are being heard? The impacts of public participation on political attention in China.
Principal Investigator: Omar Barroso Khodr Authors: Li and Zhang (2026) Original Title: Whose Voices Are Being Heard? The Impacts of Public Participation on Policy Attention in China Intervention Location: China Sample Size: 1396 observations Main Variable of Interest: Public environmental awareness at location 'i' Intervention Type: Environmental and social awareness policies. […]
Homeownership: The case of Sweden
Principal Investigator: Omar Barroso Khodr Authors: Sodini et al. (2023) – P. Sodini, SV Nieuwerburgh, R. Vestman and UvL Toal Original Title: Identifying the Benefits from Homeownership: A Swedish Experiment Intervention Location: Sweden (Northern European Country) Sample Size: 1.911 families — 567 in the treatment group and 1.344 in the support group
Populist Leaders and the Economy
Principal Investigator: Omar Barroso Khodr Authors: Funke, Schularick, and Trebesch (2023) Original Title: Populist Leaders and the Economy Intervention Location: Global comparative analysis across countries Sample Size: 60 countries, encompassing all current OECD/EU members, the nine largest countries in South America, and ten major emerging markets in Asia and the UK
Technology, Competition and Investment in the Sanitation Sector
Authors: Thiago Caldeira and Victor Gomes. Article Title: Technology, Competition, and Markups: The Organization of the Water and Sanitation Market. Location of the intervention: Brazil. Database: National Sanitation Information System (SNIS). Variable of interest: Markups of sanitation companies. Methodology: Estimation of production function and calculation of markups from production data and […]