One of the comments on my article asked about correlation and causation.
Economists are always concerned not to confuse correlation and causation.
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The results show clear patterns of relationships and causation.
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From the use of surrogate endpoints (based on biological plausibility and the results of preclinical studies) to the distinction between correlation and causation, confounding (whether the effect size is too large to be explained away by confounding), and the hypothesis-generating nature of the inferential process.
What differentiates our analysis over existing work is that we were able to go beyond mere correlations and establish causation in the relationship between corporate governance measures and firm value.
The answer is, of course, no and the reason has to do with the difference between causation and correlation.
Scientists use at least 20 million rodents a year in experiments in the U.S., to test foods, drugs and chemicals and to unearth basic truths about the causation of disease and the functioning of the human immune system.
The BP spill will generate a bewildering array of claims and chains of causation, possibly including future cancer cases claimants will blame on the carcinogens in oil.
Those are the facts necessary to satisfy the elements of a claim for, say, breach of contract: promise, consideration, failure to perform, causation and damages, or the requirements of an affirmative defense: impossibility of performance, for instance.
To repeat, correlation is not causation, and a lot more work would need to be done to prove the point.
Correlation, of course, does not equal causation - and, so far at least, there is no reason to suggest that American football causes investors to feel suddenly more bullish in a given year.
Indeed, correlation is frequently not causation, and while growing economies by definition need more money, to pump money into an economy without the growth first is to put the proverbial cart before the horse.
Establishing a statistical link between low wages and corruption does not show which way causation flows.
But correlation is not causation, so Mr Eppig and his colleagues tried to eliminate other possible explanations.
It is misleading and unrealistic to expect absolute proof of causation but it is clear that appropriate codes, properly implemented, are associated with a wide variety of favourable outcomes.
But, as will be seen below, when defending bank-failure-related malpractice cases, auditors will seek to change the game through the use of affirmative defenses and by placing a sharp focus on causation.
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Given that medical professionals and regulators act on the basis of evidence of causation that is not statistically significant, it stands to reason that in certain cases reasonable investors would as well.
Here Bergh and Henrekson are talking about correlation, but what about causation?
But causation to the side, New Orleans and now New York have taken body blows from powerful storms, and this is clearly no laughing matter.
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Two weeks ago a host of UK-based news publications spread the laughable argument that since Facebook use and syphilis infection rates are correlated, it somehow implies causation, too.
Michael Morgan, an experimental psychologist at Sussex University, admits that there are holes in the experimental record that need to be filled before the link between the drug and nasty long-term effects moves from correlation to causation.
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Even if a strong association between silicone and a disease is found, it does not necessarily establish causation.
But, and this is terribly important for today, the line of causation does not run in the opposite direction!!!
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Judge Silberman ruled that under the Wickard precedent almost any activity could be deemed, through some extended chain of causation, to have an impact on interstate commerce and thus be fit for federal control.
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So a coincidence of good and bad returns with presidencies of both parties is not proof of causation.
Maybe the causation flows in reverse: voters elect Republicans in times of economic hardship and Democrats when the economy (and the stock market) is doing well.
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The kids are not smarter because of the book collection (causation), but because of what the book collection says about their parents and the way their parents raise children (correlation).
Eventually, when the chain of causation is traced in full, the chances are that the underlying difference between polar and tropical octopuses will be in the DNA itself.
As the author, Professor Bernard Stewart, an internationally-noted expert in cancer causation, points out, there is a remarkable scientific consensus on the causes of avoidable cancer, and they relate to lifestyle choices that people can actually do something about: smoking, poor diet, excessive drinking, obesity, physical inactivity, and exposure to the sun.
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