Preterm birth after the Utah Valley Steel Mill closure: a natural experiment
In the literature the common view is a trade-off between internal and external validities, and natural experiments
lie in the middle of the scale (16).
From geology and evolutionary biology, the idea has migrated into the social sciences, which are the focus of Diamond and Robinson's Natural Experiments
Study Design: In a natural experiment
, motor vehicle crash mortality among blacks and whites was compared in Louisiana and Mississippi over two 3-year time periods: 1992 to 1994 and 1996 to 1998.
Results from explicit natural experiments
using cross-sectional data on five major tax reforms since 1920 are then presented.
We don't take advantage of the natural experiments
our federal system generates when states take the initiatives to experiment with new programs.
Patients with such perceptual defects represent unique natural experiments
providing insights into the principles by which the brain organizes information, Damasio said last week at the annual meeting of the Society for Neuroscience in Phoenix, Ariz.
18 Natural Experiments
as a Means of Testing Causal Inferences
To address this important question I will exploit unique data from seven experimental programs and natural experiments
implemented simultaneously at different schools in Israel.
The Sun makes fantastic natural experiments
that allow us to test our ideas about its effects on the climate," lead author of a report newly published in Geophysical Research Letters Prof.
It begins with a description of the differences between formal experiments and natural experiments
In addition to comparing apples to apples, randomized trials and natural experiments
also rely on assessments by disinterested non-participants and on clearly defined outcomes that other researchers can reproduce and interpret.