“…Incidence of keyword 'principal-agent' in selected journals(2005),Ürge-Vorsatz et al (2007),Sha (2013),Zhang et al (2016),Ströbele and Lützkendorf (2019) CIDavidson (2009),Vennström and Eriksson (2010),Van Duren et al (2015),Saini et al (2018),Saini et al (2019),Van den Berg et al (2020), Van Oorschot et al (2020 CMEBoukendour (2007),Bowen et al (2007),Ward and Chapman (2008),Yung and Lai (2008),Hossain (2009a),Tuuli et al (2010),Sha (2011), Bowen et al (2012,Ling and Tran (2012),Rose and Manley (2012),Chang (2013a),Espinoza and Morris (2013),Javed et al (2014),Fu et al (2015), De Valence andRuneson (2015), Winch (2015),Snippert et al (2015), De Biasio and Murray (2017),Liu et al (2017),Odoemena and Horita (2018),Gao and Liu (2019), Sha (2019), Zhang et al (2020b) ECAM Hsieh and Forster (2006), Eriksson and Laan (2007), Badenfelt (2008), Bemelmans et al (2012), Hughes et al (2012), Hosseinian and Carmichael (2014), Li et al (2014), Chong and Oon (2016), Adam et al (2017), Mei et al (2017), Chen et al (2019), Han et al (2019), Hasan and Jha (2019), Laryea (2019), Lee (2019), Wang and Shi (2019), Zhang et al (2020a) IJPM Ward et al (1991), Ward and Chapman (1991), Williams (1993), Ogunlana (1996), Farrell (2003), Turner and Müller (2003), Müller and Turner (2005), Yu et al (2005), Jensen et al (2006), Koch and Buser (2006), Smyth and Morris (2007), Turner et al (2008), Hossain (2009b), Hossain and Wu (2009), Huang and Chang (2009), Pinto et al (2009), Corvellec and Macheridis (2010), Hölzle (2010), Mahaney and Lederer (2010), Müller and Turner (2010), Bakker et al (2011), Kapsali (2011), Koppenjan et al (2011), Eriksson (2012), Hsu et al (2012), Ika et al (2012), Bond-Bernard et al (2013), Braun et al (2013), Chang (2013b), Chang (2013c), Flyvbjerg (2013), Ahola et al (2014), Biesenthal and Wilden (2014), Carbonara et al (2014), Floricel...…”