Competition Advocacy Studies. A Competition Agenda towards Integrity in Public Procurement. Lack of competition in public procurement procedures is associated with the inefficient use of public resources, as it could result in the acquisition of more expensive products or services than could be achieved with competition, with superfluous or excessive technical specifications, or in the opposite extreme, of lower quality than required, with hidden and / or unusable defects. Inefficiencies derived from the lack of competition in public procurement can occur through: • Using methods of exception to the bidding through ambiguous or subjective justifications. • Restrict participation by means of unnecessary requirements. • Grant advantages to certain agents with certain technical specifications or other criteria. • Decrease incentives for the presentation of aggressive postures. • Facilitate the coordination of bidders' positions.