Definitions for natural experiment
nat·u·ral ex·per·i·ment

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1. Natural experiment

   A natural experiment is an empirical study in which individuals (or clusters of individuals) are exposed to the experimental and control conditions that are determined by nature or by other factors outside the control of the investigators. The process governing the exposures arguably resembles random assignment. Thus, natural experiments are observational studies and are not controlled in the traditional sense of a randomized experiment (an intervention study). Natural experiments are most useful when there has been a clearly defined exposure involving a well defined subpopulation (and the absence of exposure in a similar subpopulation) such that changes in outcomes may be plausibly attributed to the exposure. In this sense, the difference between a natural experiment and a non-experimental observational study is that the former includes a comparison of conditions that pave the way for causal inference, but the latter does not. Natural experiments are employed as study designs when controlled experimentation is extremely difficult to implement or unethical, such as in several research areas addressed by epidemiology (like evaluating the health impact of varying degrees of exposure to ionizing radiation in people living near Hiroshima at the time of the atomic blast) and economics (like estimating the economic return on amount of schooling in US adults).

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1. Natural experiment

   A natural experiment is an empirical study in which the experimental conditions are determined by nature or by other factors out of the control of the experimenters and yet the treatment assignment process is arguably exogenous. Thus, natural experiments are observational studies and are not controlled in the traditional sense of a randomized experiment. Natural experiments are most useful when there has been a clearly defined and large change in the treatment to a clearly defined subpopulation, so that changes in responses may be plausibly attributed to the change in treatments. Natural experiments are considered for study designs whenever controlled experimentation is difficult, such as in many problems in epidemiology and economics.

How to pronounce natural experiment?

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How to say natural experiment in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of natural experiment in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of natural experiment in Pythagorean Numerology is: 9

Examples of natural experiment in a Sentence

1. Tom Wagner:

   The OMG mission deployed new technologies that allowed us to observe a natural experiment , much as we would do in a laboratory, where variations in ocean temperatures were used to control the flow of a glacier, their findings especially about how quickly the ice responds will be important to projecting sea level rise in both the near and distant future.

2. Scott Wolfe:

   I think the verdict is no longer out. … If we make calls indiscriminately to defund the police. We've been playing with that natural experiment over the past year or so, and the results are back in, and it's not good for our communities.

3. Cassandra Crifasi:

   It was a nice natural experiment that Connecticut passed a law and Missouri repealed, because we could see pre- and post- what the impact of the laws are.

4. Kristen Moore:

   Covid just gave us this kind of natural experiment to demonstrate that no, in fact, there is no medically justifiable reason to require patients to come into a clinic and pick up a pill that they are going to turn around and take at home.

References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Natural_Experiment
2. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=natural experiment