“…HPWS is an organization-(or unit-) level phenomenon while employee attitudes (and well-being) are (or start as) an individual level phenomenon (Peccei et al, 2013;also, Renkema, Meijerink, & Bondarouk, 2017). Though most empirical research that studied the HPWS: THE ROLES OF PSYCHOLOGICAL CAPITAL AND JUSTICE CLIMATE 5 relationship has adopted same-level designs, studies that looked at the link between organization-(or unit-) level HPWS and individual employee's job satisfaction and organizational commitment are in existence (Gong, Law, Chang & Xin, 2009;Heffernan & Dundon, 2016;Messersmith, Patel, Lepak & Gould-Williams, 2011;Takeuchi, Way & Tian, 2018;Wu & Chaturvedi, 2009). However, maybe as a reflection of the general state of research in HPWS (e.g., Boxall, Guthrie & Paauwe, 2017;Chapman, Sisk, Schatten & Miles, 2018;Jiang, Takeuchi & Lepak, 2013;Fu, Flood, Bosak, Rousseau, Morris & O'Regan, 2017) knowledge about the mechanisms underlying the link between organization-level HPWS and workplace attitudes at individual level is not yet exhaustive (Heffernan & Dundon, 2016;Takeuchi et al, 2018).…”