I want to know more about “exchange” theory in the elderly research field, thanks!

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“Exchange” theory describing the interactions of the elderly with society and the assets they provide for mutual satisfaction. According to this, it is important in older adults to achieve a balance between their contributions to society and the costs of their support. Efforts should be directed toward increasing older people’s resources so that they are valued by society. They prefer to give money, time, caregiving, or other resources in exchange for services. Important variations are observed across cultures, but according to this theory, the way in which older adults are engaged in society diverges with the nature of their power resources, such as their material possessions, knowledge, and social authority.