We bookended our review with the milestone studies from 1994-95, and the final journal editions of
2003. Only articles that presented empirical research were selected. A further criterion was that each
study should have reported research into the impact of multiple HRM-style practices on some measure of
performance, in keeping with our understanding of strategic HRM detailed above and the future research
agenda urged by Wright and Boswell (2002). This meant our search did not include „OB‟ (organisational
behaviour) journals, whose research tends to focus on the impact of single HR practices on attitudinal
and/or behavioural outcomes. This explains the absence of the likes of the Journal of Applied Psychology
and the Journal of Organizational Behavior. We are not aware of any article published in either of these
journals in the time-period that might have complied with our criterion for inclusion. As a final check we
compared our eventual sample against the list produced by Mark Huselid (http://www.markhuselid.com/)
and found no omissions