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. Of course a survey is never complete as the state of the research keeps changing. This document is intended to be a living document that gets updated every now and then as the literature grows. If you feel that some papers are not presented correctly, or simply missing, feel free to contact us. We will be more than happy to correct it.

翻译：本综述系统梳理了将参与式预算视为社会选择问题的相关文献。参与式预算是一种民主决策过程，要求公民对如何将特定公共资金分配给一系列项目进行投票。从社会选择视角来看，这对应着将关于哪些项目应获资助的意见聚合成满足预算约束的分配方案问题。该问题近年来受到学界广泛关注，相关文献正在快速积累。本综述呈现了该领域最重要的研究方向，并针对每个方向展示了大量代表性成果。我们聚焦于不可分情形，即项目只能全部资助或完全不资助的参与式预算问题。本文旨在全面概述参与式预算的研究现状，既提供当前主要研究课题的宏观综述，也对文献中最关键的技术概念给出形式化且统一的定义。当然，由于研究现状持续演进，任何综述都无法做到完备。本文定位为动态文档，将随文献增长而持续更新。若您发现某些论文表述失当或存在遗漏，欢迎随时与我们联系，我们将非常乐意予以修正。