1. Armstrong, M., 1998a. Optimal regulation with unknown demand and cost functions. Journal of Economic Theory, forthcoming.
2. Armstrong, M., (1998b). Optimal multi-object auctions. Mimeo., Oxford.
3. Armstrong, M., 1999. Price discrimination by a many-product firm. Review of Economic Studies, January.
4. Armstrong, M. , Vickers, J., 1998. Competitive price discrimination. Mimeo., Oxford.