Leite, António Nogueira2019-10-302019-10-301992-10Leite, António Nogueira, Cost Overruns in Long-Term Projects: Competing or Complementary Explanations? (October, 1992). FEUNL Working Paper Series No. 192http://hdl.handle.net/10362/85869We look at three different models expressly devoted to analysing why cost overruns are so pervasive in long-term procurement. The first two models explain cost overruns in the context of long-sane relationships between a sponsor and a contractor while the third explains cost overruns as a result of the selection bias inherent to prevalent procurement practices. We also provide a comparative assessment of this literature and discuss whether these different contributions can be seen as complementary or simply competing.engworking paper