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Does Publicity Affect Competition? Evidence from Discontinuities in Public Procurement Auctions

Decio Coviello () and Mario Mariniello ()

CSEF Working Papers from Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy

Abstract: Calls for tenders are the natural devices to inform bidders, thus to enlarge the pool of potential participants. We exploit discontinuities generated by the Italian Law on tender’s publicity to identify the effect of enlarging the pool of potential participants on competition in public procurement auctions. We show that most of the effects of publicity are at regional and European level. Increasing tenders’ publicity from local to regional determines an increase in the number of bidders by 50% and an extra reduction of 5% in the price paid by the contracting authority; increasing publicity from national to European has no effect on the number of bidders but it determines an extra reduction of 10% in the price paid by the contracting authority. No effect is observed when publicity is increased from regional to national. Finally, we relate measures of competition to ex-post duration of the works finding a negative correlation between duration and the number of bidders or the winning rebate.

Keywords: Public Procurement Auctions; Publicity; Regression Discontinuity; Duration Analysis (search for similar items in EconPapers)
JEL-codes: D02 D44 C31 L11 (search for similar items in EconPapers)
Date: 2008-01-15
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