In his influential paper of 1943, A Theory of Human Motivation, the psychologist Abraham Maslow proposed that healthy human beings have a certain number of needs, and that these needs can be arranged ...

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Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Jeanette Beebe is an experienced journalist, fact-checker, and audio producer covering personal finance, retirement, science, business, medicine, technology, and the arts. Her reporting has appeared ...