The effects on national welfare and market access of two important public procurement practices (discrimination and non-transparency) are analyzed with an eye to the ongoing international discussions on procurement reform in the Doha Round as well as regional integration agreements. The analysis suggests that the welfare payoffs of adopting mechanisms that foster domestic competition and transparency are likely to be greater than the return to efforts to ban international discrimination. However, improved transparency is unlikely to result in significant enhancements in market access, which in turn raises questions about the likely enforceability of a WTO transparency agreement.