A stochastic process {xt: t = 1,2,….} with a finite second moment [E(xt2) < ![A stochastic process {x<sub>t</sub>: t = 1,2,….} with a finite second moment [E(x<sub>t</sub><sup>2</sup>) < ] is covariance stationary if: A) E(x<sub>t</sub>) is variable, Var(x<sub>t</sub>) is variable, and for any t, h 1, Cov(x<sub>t</sub>, x<sub>t+h</sub>) depends only on 'h' and not on 't'. B) E(x<sub>t</sub>) is variable, Var(x<sub>t</sub>) is variable, and for any t, h 1, Cov(x<sub>t</sub>, x<sub>t+h</sub>) depends only on 't' and not on h. C) E(x<sub>t</sub>) is constant, Var(x<sub>t</sub>) is constant, and for any t, h 1, Cov(x<sub>t</sub>, x<sub>t+h</sub>) depends only on 'h' and not on 't'. D) E(x<sub>t</sub>) is constant, Var(x<sub>t</sub>) is constant, and for any t, h 1, Cov(x<sub>t</sub>, x<sub>t+h</sub>) depends only on 't' and not on 'h'.](https://d2lvgg3v3hfg70.cloudfront.net/TB8272/11eb6b8a_02a7_9d09_bf83_7b7fec60869d_TB8272_11.jpg)
] is covariance stationary if:
Definitions:
Personal Power
The influence or authority a person has over others, derived from their skills, qualities, or personal attributes, rather than their formal position.
Organizational Sources
The origins from which organizations draw their power, authority, resources, and information, crucial for their operation and success.
Expert Power
A form of power derived from possessing knowledge, skills, or expertise that others value, which can influence or control their behavior.
Referent Power
Influence based on identification with, admiration of, or respect for the power-holder.
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