Research on 'happiness' suggests that once an average per capital income of around US$10,000 is achieved in a country, further increases in income will not lead to a significant increase in happiness. Additional income will probably often be spent on the satisfaction of mainly 'relative' needs,...

Managing large-scale transportation infrastructure projects is difficult due to frequent misinformation about the costs which results in large cost overruns that often threaten the overall project viability. This paper investigates the explanations for cost overruns that are given in the...