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Quakers, or Friends, are members of a family of religious movements collectively known as the Religious Society of Friends. The central unifying doctrine of these movements is the priesthood of all believers. Many Friends view themselves as members of a Christian denomination. They include those with evangelical, holiness, liberal, and traditional conservative Quaker understandings of Christianity. Unlike many other groups that emerged within Christianity, the Religious Society of Friends has actively tried to avoid creeds and hierarchical structures.

What types of Christianity do Quakers belong to?
Answer: evangelical, holiness, liberal, and traditional conservative
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At the level of the individual, there is a large literature, generally related to the work of Jacob Mincer, on how earnings are related to the schooling and other human capital. This work has motivated a large number of studies, but is also controversial. The chief controversies revolve around how to interpret the impact of schooling. Some students who have indicated a high potential for learning, by testing with a high intelligence quotient, may not achieve their full academic potential, due to financial difficulties.[citation needed]

Literature on how earnings and how it relates to schooling was greatly influenced by who?
Answer: Jacob Mincer
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Voting results have been a consistent source of controversy. The mechanism of voting had also aroused considerable criticisms, most notably in season two when Ruben Studdard beat Clay Aiken in a close vote, and in season eight, when the massive increase in text votes (100 million more text votes than season 7) fueled the texting controversy. Concerns about power voting have been expressed from the very first season. Since 2004, votes also have been affected to a limited degree by online communities such as DialIdol, Vote for the Worst (closed in 2013), and Vote for the Girls (started 2010).

Which voting concern has been present since the first season?
Answer:
power voting