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If you were trained in traditional regression pedagogy, chances are that you have heard about the problem of controls The problem arises when we need to decide whether the addition of a variable to a regression equation helps getting estimates closer to the parameter of interest. Analysts have long known that some variables, when added to the regression equation, can produce unintended discrepancies between the regression coefficient and the effect that the coefficient is expected to represent. Such variables have become known as controls to be distinguished from controls (also known as or which are variables that must be added to the regression equation to eliminate what came to be known as variable bias (OVB).Recent advances in graphical models have produced a simple criterion to distinguish good from bad controls, and the purpose of this note is to provide practicing analysts a concise and visible summary of this criterion through illustrative examples.

Last week, Facebook launched some major new products, including social plugins, its Like button for the web, and its Open Graph API. It also launched a product that has some serious privacy issues: Personalization which automatically hands over some of your data to certain third party sites as soon as you visit them, without any action required on your part. I previously discussed at length why I think this could lead to a major backlash.

The National Education Union (NEU) is including pay rises in “key demands” and bosses have said that any reduction in class sizes should be “long term” not just for social distancing. Union leaders have congratulated their members for closing down schools, claiming that it was their threats to not turn up to class, as opposed to the scientific data, which led to Boris Johnson ordering that children should stay at home last month. NEU bosses described the pandemic as a “turning point” in the power of teachers over the Government, but MPs say the union is “playing politics” and “hijacking the pandemic”.

The phones could be backed by 4,500mAh batteries with support for fast charging. They will feature 5G and 4G connectivity. Both the Redmi K40 and Redmi K40 Pro are said to measure 163.7×76.4×7.8mm.. Members of the Congressional Black Caucus regularly make use of kente cloth stoles. They’ve worn them at the State of the Union to display solidarity and as a silent rebuke to President Trump for his racial and xenophobic antagonism, notably when he leveled a vulgar broadside against African nations in general. They wore kente cloth when they paid their respects to Rep.

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