The Chinese macroeconomic fluctuations from 2006 to 2008 provide good natural experiments for empirical capital structure research.

中国宏观经济2006 ~ 2008年的波动为资本结构自然实验法研究提供了条件。

youdao

The Megaupload case shows how natural experiments can arise, and how they are limited.

WSJ: Studios Struggle for Focus on Film Pirates' Booty

This tallies with the outcome of natural experiments in recent history, such as the influx of 610, 000 Russian Jews into Israel in the early 1990s, the return of 900, 000 Frenchmen from Algeria in 1962 or the homecoming of 600, 000 Portuguese after the collapse of their empire in Africa in 1974-76.

ECONOMIST: Of bedsheets and bison grass vodka

Now to help facilitate the growth of robot scientists for routine, automated experiment, King and his team are urging that the methods and processes of science be formalized, to remove the ambiguities of natural language and make it easier to reproduce experiments and build the bases of knowledge.

FORBES: Chess, Art, Robots, and the Future of Science