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  2. Instrumental variables estimation - Wikipedia

    en.wikipedia.org/wiki/Instrumental_variables...

    One computational method which can be used to calculate IV estimates is two-stage least squares (2SLS or TSLS). In the first stage, each explanatory variable that is an endogenous covariate in the equation of interest is regressed on all of the exogenous variables in the model, including both exogenous covariates in the equation of interest and ...

  3. Crossover experiment (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Crossover_experiment...

    Crossover experiments allow for experimental study of a reaction mechanism. Mechanistic studies are of interest to theoretical and experimental chemists for a variety of reasons including prediction of stereochemical outcomes, optimization of reaction conditions for rate and selectivity, and design of improved catalysts for better turnover number, robustness, etc. [6] [7] Since a mechanism ...

  4. Pump–probe microscopy - Wikipedia

    en.wikipedia.org/wiki/Pump–probe_microscopy

    The method modulates the amplitude of a pulsed laser beam, referred to as the pump, to bring the target molecule to an excited state. This will then affect the properties of a second coherent beam, referred to as the probe, based on the interaction of the two beams with the molecule. These properties are then measured by a detector to form an ...

  5. IV push - Wikipedia

    en.wikipedia.org/?title=IV_push&redirect=no

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  6. Ohio Man Allegedly Slammed Infant Who Wouldn’t Stop ... - AOL

    www.aol.com/ohio-man-allegedly-slammed-infant...

    An Ohio man allegedly slammed a 15-month-old girl on the floor after she wouldn’t stop crying, fracturing her skull. Two weeks later, she died of her injuries.

  7. Size-exclusion chromatography - Wikipedia

    en.wikipedia.org/wiki/Size-exclusion_chromatography

    Size-exclusion chromatography, also known as molecular sieve chromatography, [1] is a chromatographic method in which molecules in solution are separated by their shape, and in some cases size. [2] It is usually applied to large molecules or macromolecular complexes such as proteins and industrial polymers . [ 3 ]

  8. How much should you have in your 401(k)? Here's how your ...

    www.aol.com/finance/average-401k-balance-by-age...

    Remember that guidelines are not set in stone — rather, they're good rules to follow. For instance, if you’re 30 years old and earn $75,000, you should try to have that much saved in your 401(k).

  9. Women are being notified that they need to take action if ...

    www.aol.com/women-being-notified-action-dense...

    In New York State, Litvack found champions in the legislature to push forward a bill enhancing insurance coverage for supplemental breast cancer screening for those with New York State health plans.