First, we establish some foundations of the analysis of auctions and contracts in public procurement, contributing to our understanding of bidder behavior and desirable institutional design. In particular, we find a workable model to study bidder behavior in general scoring auctions, derive optimal scoring rule when the quality is multidimensional, and also establish a method to detect bidder collusion from large scale auction data.Second, we find how procurement design affects the performance. In particular, we empirically analyze the effect of bundling in procurement, and theoretically discover how bidder incentive changes in simultaneous or sequential multi-unit auctions

This study investigates the bidding patterns of entrant and incumbent firms in electric power procurement auctions in the Japanese retail electricity market. The study explores the reasons for the persistently low participation rate of entrants and the effects of preferential treatment aimed at enhancing the participation of entrants. The achievement of the study includes the data collection. We collected the information on each auction, including losing bids, from each auctioneer in accordance with the information disclosure system. The structural estimation of a static model found that bid discounts have little effect on entrant participation and that a lump-sum subsidy to entrants is more cost effective by enhancing participation of entrants. However, this model fails to consider the effect of supply capacity constraints of entrant, and the next step of the current study will be to take the capacity constraint into account of the model

This project is aimed at analyzing the role of human resource allocation on the productivity and hierarchy in the society. We summarize the results below. To understand how human resource allocation influences the aggregate productivity, we theoretically analyzed the relation between higher education and human resource allocation and between a firm specific human capital and human resource allocation. We also empirically investigated how the changes in presidents at Japanese corporations change the firms' strategy. To understand how human resource allocation influences the hierarchy in the society, we empirically investigated the relation between promotion and lateral transfer and how managers' tenure in target influences the retention rate as a director after M&A. We also applied a previously developed model to Japanese data to understand the hierarchy across firms. Finally, we accumulated several data such as university ranking and career for bureaucrats