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This paper suggests how the 'grey literature', the diverse and heterogeneous body of material that is made public outside, and not subject to, traditional academic peerreview processes, can be used to increase the relevance and impact of management and organization studies (MOS). The authors clarify the possibilities by reviewing 140 systematic reviews published in academic and practitioner outlets to answer the following three questions: (i) Why is grey literature excluded from/included in systematic reviews in MOS? (ii) What types of grey material have been included in systematic reviews since guidelines for practice were first established in this discipline? (iii) How is the grey literature treated currently to advance management and organization scholarship and knowledge? This investigation updates previous guidelines for more inclusive systematic reviews that respond to criticisms of current review practices and the needs of evidence-based management.

Research on managerial cognition in general, and on cognitive mapping in particular, is receiving a great deal of attention in Europe and the US, but the work being done is currently disparate and loosely coupled. Furthermore, the development of maps as a decision aid has tended to focus on specific sub-areas of cognition. In this article we argue that the broad strategic concerns of managers require a portfolio of different kinds of cognitive maps. The interactions among these maps are as important as the functions of each one separately. We develop a framework for classifying cognitive maps and argue for the importance of managing multiple maps.

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