Critics of prevailing wage laws claim that their elimination will cut total public construction costs by 15 to 25 percent. Justification for this assertion may be found in a 1983 study comparing the cost of public construction regulated by the Davis‐Bacon Act with the cost of similar private construction. However, this study failed to account for the difference in the cost of public and private buildings absent . Using F. W. Dodge data for 1991 to 1999, we show that the inclusion of the appropriate controls in a study of new school construction costs finds no statistically significant difference between the cost of public schools built with prevailing wage regulations.

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PurposeThe aim of this paper is to use stochastic frontier regression to measure the effect of the introduction and expansion of prevailing wage requirements on the cost efficiency of public school construction in British Columbia. The results provide evidence from a specific sector and location that contributes to the accumulated evidence on the topic.Design/methodology/approachStochastic frontier regression is used to measure the effect of the introduction and expansion of prevailing wage requirements on the cost efficiency of public school construction in British Columbia. The results of a likelihood ratio test indicate that stochastic frontier regression is preferred to OLS cost estimation because of the presence of statistically different cost inefficiencies across a sample of covered and uncovered projects.FindingsSpecifically, projects covered by the introductory stage of the wage requirements are significantly less cost efficient compared to other public school projects. However, by the time of the expansion of the wage policy 17 months later, covered projects were no more cost inefficient than other projects. The results indicate that if prevailing wage laws are associated with changes in the cost efficiency of construction, stochastic frontier regression is the preferred estimation technique.Research limitations/implicationsThis is the first study of its kind with results specific to school construction in British Columbia. Further research based on data from other projects may/may not confirm the existence of differences in construction cost inefficiencies for projects covered by construction wage policies.Social implicationsBy implication, the results suggest that if the cost inefficiency of prevailing wage laws is short‐lived, the impact on the total cost of construction may similarly be ephemeral. The results imply that prevailing wage regulations do not contribute to long‐run construction cost inefficiency.Originality/valueThis is the first study to use stochastic frontier regression to examine the cost inefficiencies associated with prevailing wage laws. Previous studies that examine the effect of the wage policy on construction costs are based on OLS estimation.

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The effect of prevailing wage laws on the cost of public construction has been the subject of an ongoing public policy debate. We measure this effect by comparing the public/private construction cost differential for schools built before and after British Columbia's Skills Development and Fair Wage Policy. Regression results indicate that public schools were 40.5 percent more expensive to build prior to the policy. This differential was 40.1 percent after the policy's enforcement. However, this change is not statistically significant. Regression results also indicate a stable construction cost function over the policy period. These results indicate that the effect of fair wage requirements was not different from zero in terms of magnitude or statistical significance. Combining these results with the findings of our previous research provides a comprehensive view regarding the effect of the British Columbian prevailing wage policy on school construction. This body of research, utilizing a variety of statistical methods, provides consistent evidence indicating that a relatively strong prevailing wage policy was not associated with changes in the efficiency or productivity of construction that contributes to increased building costs.