Sociology

The Holy Vote

The Itching Palm: A Study of the Habit of Tipping in America

Parenthood and Race Culture: An Outline of Eugenics

Side Show Studies

Notes of an Itinerant Policeman

Prevalence of Imprisonment in the U.S. Population, 1974–2001

Social Problems in Porto Rico

The Itching Palm: A Study of the Habit of Tipping in America

Gamblers and Gambling

Introducing the American Spirit

Portraits of Curious Characters in London, &c. &c

The Republic of the Future; or, Socialism a Reality

The Malthusian Handbook

The Forgotten Man, and Other Essays

The Town: Its Memorable Characters and Events

Nine Short Essays

Utopia of Usurers and Other Essays

Eugenics and Other Evils

What's Wrong with the World

Latter-Day Pamphlets