Tu, S., Mason, C. A., and Song, Q. (2007). Second-order linkage and family datasets. In R. C. Urbano & R. M. Hodapp (Eds.), Developmental Epidemiology of Mental Retardation and Developmental Disabilities - a volume of the International Review of Research on Mental Retardation. San Diego, CA: Elsevier.

While most linked datasets bring together information solely on individuals, creating linked family datasets for family and sibling research is possible. In this chapter, we will address the issues involved in creating databases so that family relationships can be readily determined and followed.  We will also discuss the benefits and limitations of family‐based datasets and the implications of such methods in research.