Despite an increasing number of studies showing a positive relationship between collective organisational citizenship behaviour (OCB) and unit or organisational performance, relatively little is known about the antecedents of collective OCB. In this study, we developed a collective social exchange approach to collective OCB. We hypothesised that a high performance work system (HPWS) is positively related to collective OCB through collective affective commitment (AC). We obtained data on HPWS, collective AC and collective OCB, all at the middle management group level, from 454 firms in China. Empirical results support the hypotheses.

Niemann-Pick type C (NPC) disease is an autosomal recessive disorder caused by mutations of NPC1 and NPC2 genes. Progressive neurodegeneration that accompanies NPC is fatal, but the underlying mechanisms are still poorly understood. In the present study, we characterized the association of autophagiclysosomal dysfunction with cholesterol accumulation in Npc1 ؊/؊ mice during postnatal development. Brain levels of lysosomal cathepsin D were significantly higher in mutant than in wild-type mice. Increases in cathepsin D occurred first in neurons and later in astrocytes and microglia and were both spatially and temporally associated with intracellular cholesterol accumulation and neurodegeneration. Furthermore, levels of ubiquitinated proteins were higher in endosomal/lysosomal fractions of brains from Npc1

The authors integrate the employee proactivity, information exchange, and psychological safety perspectives to develop a model of individual creativity. Proactive employees prepare themselves with resources in anticipation of effecting changes. The authors propose that proactive employees seek informational resources through exchanging with others in the workplace. Information exchange, in turn, fosters the development of trust relationships that provide psychological safety for creative endeavors. The authors collected time-lagged data from a sample of 190 matched employee-manager pairs in a specialty retail chain. The results showed that proactive employees engaged in more information exchange and, by so doing, built stronger trust relationships with supervisors and colleagues. These trust relationships, in turn, increased other seminar participants for their comments. The first two authors contributed equally.