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...

A large number of studies have shown a gradual fall in stomach cancer-related mortality rate during the last decade. Here we analyzed the pattern of stomach cancer-related mortality rates in Japanese aged85 years from 1970 to 1995. We used data for the entire population of Japan. The magnitude...