Kentaro Kawabe, Fumie Horiuchi, Rie Hosokawa, Kiwamu Nakachi, Junya Soga, Shu-Ichi Ueno
School teachers' awareness of internet addiction in elementary school students: a regional survey in Japan
Frontiers in psychiatry
1980s period average level real wage rates roughly stagnant large changes structure relative wages notably huge increase relative wages highly educated workers paper attempts assess power several alternative explanations observed relative wage changes context theoretical framework nests explanations conclusion major cause shift skill structure labor demand brought biased technological change