Altruism (biology) most common mechanism of reciprocity in nature, this kind is present in humans, primates, and many other mammals. Also known as, "If you're nice, I'll be nice too." This mechanism of reciprocity is similar to the heuristic of the golden rule, "Treat others how you would like to be treated." Parties mirror one another's attitudes, exchanging favors on the spot. Instant attitudinal reciprocity occurs among monkeys, and people often rely on it with strangers and acquaintances. Also known as, "what have you done for me lately?" Individuals keep track of the benefits they exchange with particular partners, which helps them
Used and Useful Principle during construction have moved on. Construction costs not allowed in the rate base may still be eligible to accrue interest through Allowance for Funds Used During Construction (AFUDC). This interest is added into the rate base when the project is completed. Used and Useful Principle In the utilities industry, the Used and Useful Principle is a concept that requires energy assets to be physically used and useful to current ratepayers before those ratepayers can be asked to pay the costs associated with them. This is a fundamental principle of utility regulation. The used and useful principle precedes the prudent investment