“…If the period is too long, it may fail to create an effective threat to the operator of cessation or a decision not to renew the contract with it, thus failing to sufficiently motivate the provision of good service (Muren, 2000). A long contract period also reduces the Augustin et al (2014), Beltran et al (2013), Hensher and Wallis (2005), House of Commons (2012), Preston and Almutairi (2013), Rye and Wretstrand (2014), Sakai and Takahashi (2013), van de Velde et al (2008), Wallis et al (2010), Wallis and Bray (2014), Walters (2010 possibility of reorganization and adaptation of the services in light of technological innovations or changes in demand, which are sometimes obstructed in the case of signed contracts (Berechman, 1993). In comparison, there are advantages in choosing a relatively long contract period: greater feasibility for the operator to invest in capital and equipment, better possibility of finding sources of financing and resources, and the possibility of learning in the course of the work, thereby reducing costs within the period (Muren, 2000).…”