Still other theorists are developing a resurgence of interest in complexity theory and organizations, and have focused on how simple structures can be used to engender organizational adaptations. For instance, Miner "et al." (2000) studied how simple structures could be used to generate improvisational outcomes in product development. Their study makes links to simple structures and improviser learning. Other scholars such as Jan Rivkin and Sigglekow, and Nelson Repenning revive an older interest in how structure and strategy relate in dynamic environments.