The Economics of Public Procurement; G.Piga & Khi V. Thai PART I: MANAGING RISK IN PROCUREMENT Public Procurement under Limited Liability; A.R.Engel & A.Wambach Bid Average Methods in Procurement; G.Albano, M.Bianchi & G.Spagnolo PART II: EFFICIENCY IN PROCUREMENT Combinatorial Procurement Auctions: A Collusion Remedy?; A.Lunander & J-E.Nilsson Auction Formats and Award Rules in Swedish Procurement Auctions; S.Lundberg PART III: CONTRACTING IN PROCUREMENT On the Economics of Subcontracting; A.Wambach & G.von Grawert-May Efficiency of Procurement Procedures for Medical Devices; C.Guccio, G.Pignataro & I.Rizzo PART IV: TRANSPARENCY IN PROCUREMENT Reputation-Based Governance of Public Works; L.Picci Why Do Transparent Public Procurement and Corruption Go Hand in Hand?; R.Coppier & G.Piga PART V: PROCUREMENT DESIGN Environmental Issues in Public Procurement: How Much De-centralization?; A.D'Amato Optimal Information Releasing in Multidimensional Public Procurement; N.Doni