Figure S16
A 100%
75%
Median frequency (% of peak value) 8
25%
— _ invented in 1800-1850 — _ invented in 1850-1900 1
o%
0 25 50 75 100 Years since invention
Gy 1800-1840 Hy: 1880-1920 (ass)
Number of inventions
6 5 4 3 2 1 0 1
i) 800 1850 1900 1950 2000 1800 1850 1900 1950 2000 Year of peak
800 1850 1900 1950 2000
Fig. $16. Controls. (A) We observe over the same timespan (100 years) two cohorts invented at different times. Again, the more recent cohort reaches 25% of its peak faster. (B) We verify that inventions have already reached their peak. We calculate the peak of each invention, and plot the distribution of these peaks as a function of year, grouping them along the same cohorts as used in the text. In each case, the distribution falls within the bounds of the period observed (1800-2000).
HOUSE_OVERSIGHT_017055