Trygve Haavelmo, Norwegian economist and mathematician, Nobel Prize laureate (d. 1999)
Trygve Magnus Haavelmo (13 December 1911 – 28 July 1999), born in Skedsmo, Norway, was an economist whose research interests centered on econometrics. He received the Nobel Memorial Prize in Economic Sciences in 1989.

1911Dec, 13
Trygve Haavelmo
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Events on 1911
- 14Jan
Amundsen's South Pole expedition
Roald Amundsen's South Pole expedition makes landfall on the eastern edge of the Ross Ice Shelf. - 31May
Porfirio Díaz
The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution. - 24Jul
Machu Picchu
Hiram Bingham III re-discovers Machu Picchu, "the Lost City of the Incas". - 29Aug
Native Americans in the United States
Ishi, considered the last Native American to make contact with European Americans, emerges from the wilderness of northeastern California. - 12Dec
Calcutta
Delhi replaces Calcutta as the capital of India.