The paper investigates the effect of teacher characteristics (experience, level of education attainment and credentials, gender) on the achievement of eighth grade students using matched student-teacher data from the 1999, 2003 and 2007 TIMSS surveys. The analysis covers European countries, thus...

In this paper, we consider the single machine scheduling problem with linear earliness and quadratic tardiness costs, and no machine idle time. We propose a genetic approach based on a random key alphabet. Several genetic algorithms based on this approach are presented. These versions differ on...