Quality of road construction projects in Sweden between 1990 and 2010
It has been reported that productivity developments in construction are slow compared to other sectors. Measuring productivity is however not easy and it might have been underestimated due to deficiencies in the index that is used when the value added in current prices is converted into value added at constant prices. A central problem when deflating nominal prices is that the deflation should only take away price changes for identical products and not price changes related to quality changes and improvements necessitated by new environmental conditions and legislation as well as demand for higher safety. The aim of this project is to help fill this gap by looking at the quality changes over time in road construction. A combination of comparative studies and interviews with practitioners from public and private sectors that are involved in road construction projects were conducted. It was found that there had been both direct quality changes in the roads, primarily to improve safety on the roads and for noise protection, and indirect quality changes related to building in more difficult circumstances because of giving higher weight to other social objectives, especially environmental objectives. As these quality increases are not taken into account when productivity is measured, productivity improvements could be underestimated by around 1% per year.
Blis, M. and Klenow, P. (2000) Quantifying quality growth, NBER working paper No. 7695.
Borg, L. (2013) Quality change and implication for productivity development housing construction in Sweden 1990-2010, Forthcoming working paper, Building and Real Estate Economics, KTH.
Heldal, I. (2007) 'Supporting participation in planning new roads by using virtual reality system', Virtual Reality, 11 (2-3), 145-159. http://dx.doi.org/10.1007/s10055-006-0061-3
IRTAD (2011) International Transport Forum, http://www.internationaltransportforum.org/, accessed on 25/5/2013 null
5 Jonsson, P. (2012) 'Transport asset management: quality-related accounting, measurements and use in road management' process', Doctoral Thesis in Building and Real Estate Economics, KTH."
Lay, M. (2009) Handbook of Road Technology, Spon Press.
Lind, H. and Song, H. (2011) Dâlig produktivitetsutveckling i byggindustrin: Ett faktum eller ett mâtfel? KTH null
8 Mandell, S. and Nilsson, J.-E. (2010) A Comparison of nit price and fixed price contracts for infrastructure construction projects. No 2010:13, Working Papers, Swedish National Road & Transport Research Institute (VTI)."
National Institute of Economic Research (2010) www.konj.se accessed on 28/4/1013 null
10 Ofori. G. (1992) 'The environment: the fourth construction project objective?', Construction Management and Economics, 10 (5), 369-395, http://dx.doi.org/10.1080/01446199200000037
Smith, K., Von Haefen, R, and Zhu, W. (1999) 'Do Environmental Regulations Increase Construction Costs for Federal-Aid Highways? A Statistical Experiment', Journal of Transportation and Statistics, 2 (1), 45-60.
STA (2010) Swedish Transportation Administration annual report, www.trafikverket.se accessed on 28/4/2013 null
13 Warsame A (2011) 'Performance of Construction Projects: Essays on Supplier Structure, Construction Costs and Quality Improvement', Doctoral Thesis in Building and Real Estate Economics, KTH."