Scandinavian Working Papers in Economics
Umeå Economic Studies,
Umeå University, Department of Economics
No 920: The Competition Effect in a Public Procurement Model: An error-in-variables approach
David Sundström ()
Additional contact information
David Sundström: Department of Economics, Umeå University, Postal: Department of Economics, Umeå School of Business and Economics, Umeå University, S 901 87 Umeå, Sweden
Abstract: Auction theory suggests that as the number of bidders (competition) increases, the sizes of the participants’ bids decrease. An issue in the empirical literature on auctions is which measurement(s) of competition to use. Utilizing a dataset on public procurements containing measurements on both the actual and potential number of bidders I find that a workhorse model of public procurements is best fitted to data using only actual bidders as measurement for competition. Acknowledging that all measurements of competition may be erroneous, I propose an instrumental variable estimator that (given my data) brings about a competition effect bounded by those generated by specifications using the actual and potential number of bidders, respectively. Also, some asymptotic results are provided for non-linear least squares estimators obtained from a dependent variable transformation model.
Keywords: dependent variable transformation model; instrumental variable; measurement error; non-linear least squares
JEL-codes: C26; C51; C57; D22; D44
34 pages, First version: January 11, 2016. Revised: June 17, 2016.
Full text files
182804_ues920.pdf
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