The Returns to Public Library Investment
研究了美国公共图书馆资本投资对图书馆使用率和附近学区学生考试成绩的影响，发现投资能显著提升阅读成绩。
Local governments spend over $12 billion annually funding the operation of 15,427 public libraries in the United States, yet we know little about their effects. We use data describing the near universe of public libraries to show that public library capital investment increases library visits, children’s attendance at library events, and children’s circulation by an average of 5–15 percent in the years following investment. Increases in library use translate into improved test scores in nearby school districts: a $200 or greater per student capital investment in local public libraries increases reading test scores by 0. 01–0.04 standard deviations in subsequent years.