Abstract: We design an iterative procurement combinatorial auction (CA) rules based on price-quality bidding pattern,then construct the conception "competitive equilibrium score"(CES) to formulate optimization problem for the quality-related CA mechanism. By applying CES and a linear program plus its dual, we model the objective function as allocation efficiency and constraints according to the auction rules. The model implements a primal-dual algorithm for the auction,computing a feasible primal and a feasible dual that satisfy complementary slackness conditions when auction terminates,meanwhile allocation efficiency is achieved in the iterative procurement CA.

Key words: multi-attribute procurement auction, combinatorial auction, dynamic mechanism design