For instance a natural experiment in Norway where the school leaving age was changed suggested that IQ was raised by additional year of school.
32.
Feldstein and Feenberg suggest that this group offers a suitable control for a natural experiment in the effect of higher rates on tax revenue.
33.
Since quasi-experiments are natural experiments, findings in one may be applied to other subjects and settings, allowing for some generalizations to be made about population.
34.
"Looking at the planet's past provides natural experiments that gives us insights into processes that we wouldn't otherwise be able to understand, " said Olsen.
35.
But when New Jersey in 1992 raised its minimum to $ 5.05 an hour from $ 4.25, they jumped at the opportunity for a natural experiment.
36.
Robert Brewer, a doctor with the National Center for Injury Prevention and Control in Atlanta, called the increased speed limits " one big natural experiment ."
37.
He introduced the idea of the " natural experiment " the quest for suggestive examples from nature and this became a favourite teaching device.
38.
Now any family's history could be viewed as a natural experiment, and what has become known among biologists as the revolution in human genetics was truly launched.
39.
A rare natural experiment has given researchers hope of using stem cells to treat muscular dystrophy, a group of genetic diseases that cause progressive wasting of the muscles.
40.
But when New Jersey in 1992 raised its minimum to $ 5 . 05 an hour from $ 4 . 25, they jumped at the opportunity for a natural experiment.
