We present an easy-to-implement method to identify the optimal number of bidders in public procurement auctions. We examine a unique data set that covers all government procurement auctions comprising more than half a million observations. We show that there is an optimal number of bidders at...

This paper empirically investigates the effect of the competitive environment (number of participants) on the cost of procurement. We use a unique dataset provided by the Public Procurement Authority (PPA) of Turkey that covers all of the government procurement auctions for the years...

Abstract Public procurement data sets usually lack detailed data that are needed to implement existing methods of collusion detection. We design a method to identify and test for bid rigging in procurement auctions using limited information. The method can be applied to limited data sets using...

We empirically investigate the effect of entrants and incumbents on the efficiency of public procurement auctions. We use a unique data set that covers all Turkish public procurement auctions for the years 2004 to 2010. We find that procurement prices of auctions won by entrants are...

Different types of products are procured in government procurement auctions. This paper empirically analyzes the effect of competition (number of bidders) on procurement price of different types of products. In other words, we investigate the optimal number of bidders which minimizes procurement...

This paper investigates effects of macroeconomic conditions in an economy on government procurement (GP) auctions. Specifically, two research questions are examined: 1) What are the eff ects of macroeconomic variables on the competitive environment (number of bidders) in GP auctions? 2) How does...