This paper starts from the premise that the scope of the appraisal of transport projects should depend upon the presence (or absence) of various forms of market failure. It reviews the purposes and processes of transport appraisal before setting out a typology of market failures. Then it...

The paper advances the log-generalized gamma distribution as a suitable generator of conditional skewness. Based on the NYSE composite daily returns an asMA-asQGARCH model along with skewness dynamics is estimated. The results indicate a skewness that varies between sizeable negative skewness...