We present the protocol of international economics experiments conducted to study the relationship between globalisation, social identity and propensity to cooperate. We developed a scale of individual-level globalisation and three scales of local, social and global social identity. Three experimental decisions in social dilemmas measured the propensity to cooperate at the local, national and global level. Participants were about 200 adults from six countries (US, Italy, Russia, Argentina, South Africa and Iran). Articles from this research have been published as: - Grimalda G, Buchan N, Brewer M (2018). Social identity mediates the positive effect of globalization on individual cooperation: Results from international experiments. PLoS ONE 13(12): e0206819. https://doi.org/10.1371/journal.pone.0206819. - Buchan N, Brewer M, Grimalda G, Wilson R, Fatas E, Foddy M (2011). “Global Social Identity and Global Cooperation”, Psychological Science, 22(6): 821-828. Doi: 10.1177/0956797611409590. - Buchan N, Grimalda G, Wilson R, Brewer M, Fatas E, Foddy M (2009) “Globalization and Human Cooperation”, Proceedings of the National Academy of Sciences of the USA, 106 (11): 4138-4142. (doi: 10.1073/pnas.0809522106).