Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper studies secure implementation [Saijo, T., Sjöström, T., Yamato, T., 2007. Secure implementation. Theoretical Economics 2, 203-229] in economies with indivisible objects and money. We establish that on any minimally rich domain that is proposed in our paper, only constant social choice functions are securely implementable.