For a review of measuring interdisciplinary research, see Wagner2011approaches.
Several stylized facts have been found, which are concisely summarized in VanNoorden2015interdisciplinary. - interdisciplinary research is increasing. - It takes time to have an impact. - some fields are more interdisciplinary than others.
- Nature special: INTERDISCIPLINARITY
- Are top-cited papers more interdisciplinary?
- Evaluating the impact of interdisciplinary research: a multilayer network approach