Time for Growth

This paper studies the impact of the early adoption of one of the most important high-technology machines in history, the public mechanical clock, on long-run growth in Europe. We avoid en- dogeneity by considering the relationship between the adoption of clocks with two sets of instru- ments: distance from the first adopters and the appearance of repeated solar eclipses. The latter instrument is motivated by the predecessor technologies of mechanical clocks, astronomic instru- ments that measured the course of heavenly bodies. We find significant growth rates between 1500 and 1700 in the range of 30 percentage points in early adoptor cities and areas.