Riding the tiger : popular organizations, political parties and urban protest -- Setting the stage : research design, case selection, and methods -- The limits of loyalty -- A union born out of struggles : the Union of Municipal Public Servants of Sáo Paulo -- Partisan loyalty and corporatist control : the Unified Union of Workers of the Government of the Federal District -- Clients or citizens? : neighborhood associations in Mexico City -- Favelas and cortiços : neighborhood organizing in Sáo Paulo -- The dynamics of protest.