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Excel has been the undisputed king of spreadsheets for decades. Countless professionals rely on it daily for everything from simple data tracking to complex financial modelling. But if I told you that ...

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Pupil dilation provides a physiological readout of information gain during the brain's internal process of belief updating in the context of associative learning.

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Dr. JeFreda R. Brown is a financial ...