Using newly digitized data on the growth of the telegraph network in America during 1840-1852, the paper studies the impacts of the electric telegraph on national elections. I use proximity to daily newspapers with telegraphic connections to Washington to generate plausibly exogenous variation...

During the first two decades of the 20th century, diarrheal deaths among American infants and children surged every summer. Although we still do not know what pathogen (or pathogens) caused this phenomenon, the consensus view is that it was eventually controlled through public health efforts at...

According to Troesken (2004), efforts to purify municipal water supplies at the turn of the 20th century dramatically improved the relative health of blacks. There is, however, little empirical evidence to support the Troesken hypothesis. Using city-level data published by the U.S. Bureau of the...

This study explores the relationship between the adoption of industrial robots and workplace injuries. Using establishment-level data on injuries, we find that a one standard deviation increase in our commuting zone-level measure of robot exposure reduces work-related annual injury rates by...

We analyze the effects of exposure to industrial robots on labor markets and household behaviors, exploring longitudinal household data from China. We find that a one standard deviation increase in robot exposure led to a decline in labor force participation (-1%), employment (-7.5%), and hourly...

We study a far-reaching episode of demagoguery in American history. From the late 1940s to 1950s, anti-communist hysteria led by Senator Joseph McCarthy and others gripped the nation. Hundreds of professionals in Hollywood were accused of having ties with the communist. We show that these...