Kentaro Hatsumi and Rieko Ishii. "The Effect of Price on the Quality of Public Construction in Japan." forthcoming in Japan & The World Economy.

Huber, Martin, David Imhof, and Rieko Ishii. "Transnational machine learning with screens for flagging bid-rigging cartels." Journal of the Royal Statistical Society: Series A (2022).

Ishii, Rieko. "Can E-Procurement Reduce Bid Rigging in Public Auctions?." Journal of Competition Law & Economics (2021).

Ishii, Rieko. "Bid roundness under collusion in Japanese procurement auctions." Review of Industrial Organization 44.3 (2014): 241-254.

Arai, Koki, Ikuo Ishibashi, and Rieko Ishii-Ishibashi. "Research and analysis on bid rigging mechanisms." Japan and the World Economy 23.1 (2011): 1-5.

Ishii, Rieko. "Favor exchange in collusion: Empirical study of repeated procurement auctions in Japan." International Journal of Industrial Organization 27.2 (2009): 137-144.

Ishii, Rieko. "Collusion in Repeated Procurement Auction: a Study of Paving Market in Japan." ISER Discussion Paper No. 710, 2008.