Sun Dec 8th through Sat the 14th, 2019 at Vancouver Convention Center
There was some disagreement among the reviewers. In a subsequent discussion, the positive points outweighed the negative ones and I am happy to support acceptance. The topic is important, the approach is reasonable and the empirical contribution, despite some caveats, is convincing. That being said, I ask the authors to incorporate the reviewers' suggestions in the final version of their paper.