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Econometrics

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Is the Zero of a Quadratic Function a Maximum or a Minimum?

EMETRC-QNBTGX

The slope of the function:

$$f(\beta) = 2\beta - \beta^2$$

...is equal to zero at the point $\beta^*=1$. Is $\beta^*$ a maximum or minimum point of the function $f(\beta)$?

A

Maximum

B

Minimum