“…The methodologies used vary among Gaussian process regression and mixed effects linear regression, and multivariate linear regression (Rajaratnam et al, 2010;Lozano et al, 2012;Schell et al, 2007;Muldoon et al, 2011;Sartorius and Sartorius, 2014). In search for a simpler projection model for long-term trends, we have used experience curve models in such areas as energy (Chang et al, 2012;Chang and Jeon, 2014), road fatality (Chang and Lee, 2013;Chang, 2014), and crime (Chang and Choi, 2016). We aim to develop and apply the experience curve model to project IMR in this paper.…”