Oxfam researcher/evaluation adviser Uwe Gneiting introduces a new set of case studies It’s an age-old puzzle – why do some advocacy and campaigning efforts manage to influence the political agendas of governments, international institutions and corporations but others don’t? What explains the difference in attention, resource mobilization and policy traction of some issues (e.g. anti-Apartheid, HIV/AIDS) compared to others (e.g. the