Cicala, Steve; Fryer, Roland G. and Spenkuch, Jörg L. (2011): A Roy Model of Social Interactions. Unpublished.
Fryer, Roland G.; Pager, Devah and Spenkuch, Jörg L. (2011): Racial Disparities in Job Finding and Offered Wages. Unpublished.
Fryer, Roland G.; Levitt, Steven D.; Kahn, Lisa and Spenkuch, Jörg L. (2010): The Plight of Mixed Race Adolescents. Unpublished.
