PPPs vary across industries and that some are more frequent than others. All types of PPP arrangements involve private operation and management and most have private investments as well. The main distinguishing characteristics lie in the mode of entry, ownership, risk sharing and duration of the partnership. This raises the question of private partners' motives to engage in different types of PPPs.

This research investigates the factors influencing the survival of PPP projects in Poland over the period 2009-2015. Both Cox proportional hazard and competing risk models with time-varying covariates are utilized to distinguish between PPPs that succeeded to the operation phase and those that were cancelled on the procurement stage.