“…The concept was further developed by a number of institutionalist labour economists in the US during the 1970s and 1980s, in particular Peter Doeringer, Michael Piore and Paul Osterman (Doeringer and Piore, 1971;Osterman, 1984Osterman, , 1987Osterman, and 1994Osterman and Burton, 2005;Piore, 2002). In addition, a number of economists working in the more mainstream fields of new institutional economics (Baker et al, 1994a and b;Wachter and Wright, 1990;Williamson et al, 1975) and personnel economics (Lazear, 1992;Lazear and Oyer, 2004) have made important contributions to the study of ILMs.…”