Over the past two decades, many developing countries have grown to become more familiar with the notions and the use of public-private partnership/private financing initiative (PPP/PFI) schemes in building large-scale infrastructure assets. However, owing to higher levels of complexity and...

Single index models are natural extensions of linear models and overcome the so-called curse of dimensionality. They have applications to many fields, such as medicine, economics and finance. However, most existing methods based on least squares or likelihood are sensitive when there are...