Baumert, Jürgen Max Planck Institute for Human Development, Max Planck Society;
http://dx.doi.org/10.1037/edu0000135 (Publisher version)
Stäbler, F., Dumont, H., Becker, M., & Baumert, J. (2017). What happens to the fish's achievement in a little pond? A simultaneous analysis of class-average achievement effects on achievement and academic self-concept. Journal of Educational Psychology, 109(2), 191-207. doi:10.1037/edu0000135.