Optimal Unbiased Randomizers for Regression with Label Differential Privacy - Badanidiyuru Varadaraja, Ashwinkumar; Ghazi, Badih; Kamath, Pritish; Kumar, Ravi; Leeman, Ethan; Manurangsi, Pasin; Varadarajan, Avinash V; Zhang, Chiyuan (Advances in Neural Information Processing Systems, 2023)