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分类依据与纠错

AI 根据所提供的论文材料归类:摘要研究通用分布式统计估计与优化,未提供足以归入所列经济计量细分方向的依据。

反馈分类问题

正在核对关联版本…

代码、数据与补充材料

正在核对对应版本的资源…

关注这篇论文的作者
Jianqing Fan
Yongyi Guo
Kaizheng Wang

通信高效且准确的统计估计

研究问题
数据分散存储时,如何减少节点与中央处理器之间的通信,同时维持优化收敛速度并获得统计有效的估计?
方法与思路
作者提出两种 CEASE 迭代算法,节点并行计算后汇总并广播信息,利用节点损失函数的相似性推进更新。
材料陈述的贡献
摘要称算法无需良好初始化即可在一般条件下线性收敛,并给出逐步精度改善、有限步效率及单步效率条件。
阅读关注点
应核对节点样本量和损失函数相似性要求、通信量的计算方式,以及优化误差收缩如何转化为统计效率。
阅读边界
这是 arXiv 预印本,同行评审及期刊接收未核验;摘要未列明一般条件、具体通信节省或隐私保护保证。

原文摘要

When the data are stored in a distributed manner, direct application of traditional statistical inference procedures is often prohibitive due to communication cost and privacy concerns. This paper develops and investigates two Communication-Efficient Accurate Statistical Estimators (CEASE), implemented through iterative algorithms for distributed optimization. In each iteration, node machines carry out computation in parallel and communicate with the central processor, which then broadcasts aggregated information to node machines for new updates. The algorithms adapt to the similarity among loss functions on node machines, and converge rapidly when each node machine has large enough sample size. Moreover, they do not require good initialization and enjoy linear converge guarantees under general conditions. The contraction rate of optimization errors is presented explicitly, with dependence on the local sample size unveiled. In addition, the improved statistical accuracy per iteration is derived. By regarding the proposed method as a multi-step statistical estimator, we show that statistical efficiency can be achieved in finite steps in typical statistical applications. In addition, we give the conditions under which the one-step CEASE estimator is statistically efficient. Extensive numerical experiments on both synthetic and real data validate the theoretical results and demonstrate the superior performance of our algorithms.

笔记与分组
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