This lecture by the instructor covers ten case studies of informal networks in East Africa, focusing on corruption in public services and business opportunities. It explores the motivations behind building these networks and the challenges faced in accessing public services and business opportunities. The lecture also delves into anti-corruption interventions based on the principal-agent model, discussing direct and indirect methods to prevent corruption. Additionally, it highlights the importance of compliance programs and collective action as solutions for small and medium enterprises to combat corruption effectively.