Acknowledgments
We thank Giovanna Capizzi, M. Schoonhoven, and R. Goedhart again for their valuable comments and suggestions; Guest Editors Ronald J. M. M. Does and Marit Schoonhoven; and the Program Committee of the Stu Hunter Research conference 2015 in Leuven for inviting the first author as a keynote speaker.
Funding
Bart De Ketelaere acknowledges the Industrial Research Fund of the KU Leuven for their financial support in stimulating the collaboration between academia and industry. Eric Schmitt and Mia Hubert acknowledge the financial support of the Internal Fund KU Leuven.