In this survey, we review the literature investigating participatory budgeting as a social choice problem. Participatory Budgeting (PB) is a democratic process in which citizens are asked to vote on how to allocate a given amount of public money to a set of projects. From a social choice perspective, it corresponds then to the problem of aggregating opinions about which projects should be funded, into a budget allocation satisfying a budget constraint. This problem has received substantial attention in recent years and the literature is growing at a fast pace. In this survey, we present the most important research directions from the literature, each time presenting a large set of representative results. We only focus on the indivisible case, that is, PB problems in which projects can either be fully funded or not at all. The aim of the survey is to present a comprehensive overview of the state of the research on PB. We aim at providing both a general overview of the main research questions that are being investigated, and formal and unified definitions of the most important technical concepts from the literature.

翻译：本文综述了将参与式预算视为社会选择问题的相关文献。参与式预算（Participatory Budgeting, PB）是一种民主进程，公民被要求就如何将一定数额的公共资金分配给一系列项目进行投票。从社会选择的角度来看，它对应于将关于哪些项目应获得资助的意见进行聚合，从而形成满足预算约束的预算分配问题。这一问题近年来受到广泛关注，相关文献正迅速增长。在本文综述中，我们介绍了文献中最重要的研究方向，并针对每个方向展示大量代表性成果。我们仅关注不可分情形，即项目要么完全获得资助，要么完全不获得资助的参与式预算问题。本综述旨在对参与式预算研究现状提供全面概述。我们力求既概括当前研究的主要核心问题，又对文献中最重要的技术概念给出正式且统一的定义。