Question: Who developed one of the earliest versions of social exchange theory?

Disambiguated questions and answers:
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question: Who that died in 1986 developed one of the earliest versions of social exchange theory?
short_answers: John W. Thibaut
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question: Who that died in 2003 developed one of the earliest versions of social exchange theory?
short_answers: Harold H. Kelley
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question: Who that died in 1989 developed one of the earliest versions of social exchange theory?
short_answers: George C. Homans
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question: Who that died in 2002 developed one of the earliest versions of social exchange theory?
short_answers: Peter M. Blau
context: During the beginning of this theory, The most comprehensive social exchange theories are those of the American social psychologists John W. Thibaut (1917–1986) and Harold H. Kelley (1921–2003), the American sociologists George C. Homans (1910–1989), Peter M. Blau (1918–2002), Richard Marc Emerson (d. 1982), and Claude Lévi-Strauss (1908–2009). Homans defined social exchange as the exchange of activity, tangible or intangible, and more or less rewarding or costing between at least two persons. After Homans founded the theory, other theorists continued to write about it, particularly Peter M. Blau and Richard M. Emerson, who in addition to Homans are generally thought of as the major developers of the exchange perspective within sociology. Homans' work emphasized the individual behavior of actors in interaction with one another. Although there are various modes of exchange, Homans centered his studies on dyadic exchange. John Thibaut and Harold Kelley are recognized for focusing their studies within the theory on the psychological concepts, the dyad and small group. Lévi-Strauss is recognized for contributing to the emergence of this theoretical perspective from his work on anthropology focused on systems of generalized exchange, such as kinship systems and gift exchange.
question: Who that died in 1982 developed one of the earliest versions of social exchange theory?
short_answers: Richard Marc Emerson
wikipage: Social exchange theory
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question: Who that died in 2009 developed one of the earliest versions of social exchange theory?
short_answers: Claude Lévi-Strauss

Long-form answers:
knowledge: content: Social exchange theory is a sociological and psychological theory that studies the social behavior in the interaction of two parties that implement a cost-benefit analysis to determine risks and benefits. The theory also involves economic relationships—the cost-benefit analysis occurs when each party has goods that the other parties value.
wikipage: Social exchange theory
long_answer: Social exchange theory is a sociological and psychological theory that studies the social behavior in the interaction of two parties that implement a cost-benefit analysis to determine risks and benefits, as well as economic relationships—the cost-benefit analysis occurs when each party has goods that the other parties value. During the beginning of this theory, the most comprehensive social exchange theories are those of the American social psychologists John W. Thibaut 1917–1986, and Harold H. Kelley 1921–2003. And American sociologists George C. Homans 1910–1989, Peter M. Blau 1918-2002, Richard Marc Emerson, died in 1982, and Claude Lévi-Strauss 1908–2009.