Study On The Distribution Of Bidding Quotations For Horizontal Collusion Of Construction Projects

In 2000,China promulgated the “Law of the People’s Republic of China on Tenders and Bids”,which indicated that the tendering and bidding market in China had entered the legal stage formally.In recent years,with the increasing investment in infrastructure in China,there are more and more collusion phenomena in the bidding market,among which horizontal collusion is the typical one.The emergence of horizontal collusion in succession not only harms the rights and interests of owners and independent bidders,but also endangers the healthy and stable development of the construction market.Only by correctly identifying the conspiracy signal can we put forward the conspiracy governance suggestions.Among many collusion signals,bidding quotation is the most obvious and difficult to conceal.Therefore,the study of the distribution law of horizontal collusion bidding quotation has substantial theoretical and practical significance.Guided by bidding theory,horizontal collusion theory and system engineering theory,this paper uses mathematical statistics method to fit the floating rate distribution function of the bidding price of independent bidders by taking 3670 electronic bidding projects in G city from 2016 to 2018 as examples.A Monte Carlo simulation bidding method based on the bidding law is proposed.This paper constructs the horizontal collusion bidding quotation simulation model based on the quotation distribution function of independent bidders and the Monte Carlo simulation method.Based on the output data of the model and the quotation data of independent bidders,the paper studies the distribution law of horizontal collusion bidding quotation under different project categories,different investment scales and different bidders.Finally,the paper gives some suggestions on identifying and managing horizontal collusion.taThe results show that there are significant differences in the distribution law of horizontal collusion bidding quotation under different types of projects,different investment scales and different bidders,and there are different distribution characteristics and fitting functions under different collusion ratios.This study puts forward the distribution law of horizontal collusion bidding quotation under different classifications,which provides a certain basis to identify and diagnose the horizontal collusion phenomenon in the bidding market,and help the regulatory authorities to formulate the collusion management strategy to ensure the healthy operation of the construction market.