Typhoid Rates and the Public Acquisition of Private Waterwork, 1880–1920
检验进步时代改革者关于私人供水公司城市伤寒发病率更高的说法，发现私人公司更常投资滤水器，且从私人转为公共供水对降低伤寒率作用不大。
Progressive-Era reformers claimed typhoid, a waterborne disease, was more prevalent in cities with private water companies than in cities with public water companies. This article tests this claim for the 1880 to 1920 period. The evidence suggests private companies invested in water filters more often than public companies, and that switching from private to public provision of water did little to improve typhoid rates.