Harhoff, Dietmar MPI for Innovation and Competition, Max Planck Society;
https://arxiv.org/pdf/1909.00736.pdf (Preprint)
Bauer, V., Harhoff, D., & Kauermann, G. (2022). A Smooth Dynamic Network Model for Patent Collaboration Data. AStA - Advances in Statistical Analysis, 106, 97-116. doi:10.1007/s10182-021-00393-w.