“…Non-traditional models may also include skill mix models (McGillis-Hall, 2003). These models are generated from studies that seek to measure staffi ng numbers as an indicator and measure of quality care (Castle & Engberg, 2007;Harrington, 2004;Harrington, 2005aHarrington, , 2005bHarrington, Kovner et al, 2000;Harrington, O'Meara, Collier, Schnelle, 2003;Harrington, Zimmerman, Karon, Robinson, & Beutel, 2000;Mueller & Karon, 2004;Mueller et al, 2006;Räikkönen, Perälä, & Kahanpää, 2007;Schnelle et al, 2004;Zhang et al, 2006).…”