摘要:What does it take to make a coalition successful? Bigger coa - litions are more likely to be successful because the GATT/WTO is a consen - sus-based institution and countries are informally penalized if they isolate them - selves. Through a Bayesian statistical analysis, the article corroborates the above hypothesis. To further investigate the research question, qualitative case studies of the G-10 in the Uruguay Round and the Public Health Coalition in the Doha Round are conducted. These cases show that the more convincing the framing of a position, the better are the chances of coalitions keeping a large number of followers and supporters, thereby affecting their odds of success. By building a unique database and applying a new research design to the topic, the study rigor - ously tests theories about coalitions that had previously only been proposed but not empirically analyzed.