Billy Jack is Vice Provost of Research and Professor of Economics at Georgetown University. He is also director of gui²de, the Georgetown University Initiative on Innovation, Development and Evaluation, which conducts empirical field-based research to assess the impact and effectiveness of development interventions. Previously he held positions on the Joint Committee on Taxation of the US Congress, the IMF, the Australian National University, and the University of Sydney. He holds a BSc in Mathematics and Physics from the University of Western Australia and an MPhil and DPhil in Economics from Oxford University, where he was a Rhodes Scholar.