Paper:
Maximum Margin Interval Trees
Learning a regression function using censored or interval-valued output data is an important problem in fields such as genomics and medicine. The goal is to learn a real-valued prediction function, and the training output labels indicate an interval of possible values. Whereas most existing algorithms for this task are linear models, in this paper we investigate learning nonlinear tree models. We propose to learn a tree by minimizing a margin-based discriminative objective function, and we provide a dynamic programming algorithm for computing the optimal solution in log-linear time. We show empirically that this algorithm achieves state-of-the-art speed and prediction accuracy in a benchmark of several data sets.

Review:
The authors of this paper present a new decision tree algorithm for the interval regression problem.  Leaves are partitioned using a  margin based hinge loss  similar to the L1-regularized hinge loss in Rigaill et al, Proc ICML 2013. However, the regression tree algorithm presented in this work is not limited to modeling linear patterns as the L1-regularized linear models in Rigaill et al.  For training the non linear tree model, a sequence of convex optimization subproblems are optimally solved in log-linear time by  Dynamic Programming (DP). The new maximum margin interval tree (MMIT) algorithm is compared with state-of-the-art margin-based and non-margin-based methods in several real and simulated datasets.
-	In terms of originality, the proposed margin based hinge loss is similar to the L1-regularized hinge loss in Rigaill et al, Proc ICML 2013. However, the regression tree algorithm presented in this work is not limited to modeling linear patterns as the L1-regularized linear models in Rigaill et al. MMIT achieves low test errors on nonlinear datasets and yields accurate models on simulated linear datasets as well. 
-	In terms of significance: interval regression is a fundamental problem in fields such as survival analysis and computational biology. There are very few algorithms designed for this task, and most of them are linear models. A  method learning nonlinear tree models like Maximum Margin Interval Trees (MMIT) could be helpful for practitioners in the field.
-	It terms of quality, the paper is fairly executed, the authors compare MMIT with state-of-the-art margin-based and non-margin-based methods in several real and simulated datasets. The 11-page supplementary material contains proofs, pseudocode, details of the open source implementation (link was hidden for anonymity) and of the experiments.
-	In terms of clarity, this is a well written paper.
In summary, my opinion is that this is a well written and nicely organized work; the proposed method would be useful in real-world applications, and the novelty of the work satisfies the NIPS standards. Thus I recommend this work for publication.