This dataset contains the data collected during a voting experiment carried out in the city of Faches-Thumesnil, in nothern France, during the first round of the presidential election in April 2007. Participants were invited to vote using the Instant Runoff Voting method (also called Hare's method). The data was collected by Etienne Farvaque, Hubert Jayet and Lionel Ragot, and prepared for open access by Théo Delemazure. If you use this dataset, please cite the following paper: Etienne Farvaque, Hubert Jayet, Lionel Ragot. Quel mode de scrutin pour quel « vainqueur » ? Une expérience sur le vote préférentiel transférable, Revue d'économie politique, Vol. 119, No. 2 (mars-avril 2009), pp. 221-246 (26 pages) You can additionally cite the Zenodo entry of the dataset.