Both human capital accumulation and Lazear contracts can explain the raising wage of salary/wage worker through job experience or tenure. To distinguish between these two effects, Lazear and Moore (1984) used self-employed workers’ wage growth to partial out the effect of human capital...

The widespread use of illicit substances by American teenagers has attracted the interest of both the public and academic researchers. Among the various factors that people believe influence youth substance use, peer effects are identified as a critical determinant; substance use is considered a...