This paper considers a non-autonomous competitive two-species model with stage structure in one species. The conditions of permanence obtained. Furthermore, the existence and asymptotic stability of the periodic solution are proved under some assumptions if this model turns out to be a periodic...

Using social exchange theory, we explore the exchange of favors and different rules of exchanges in China, Japan, and India. Although social exchange theorists have directed their attention to the universality of the norms of reciprocation and have indicated the prevalence of an instrumental...