This paper introduces modal logics to a sociological audience. We first provide an overview of the formal properties of this family of models and outline key differences with classical first-order logic. We then build a model to represent processes of perception and belief core to social...

"To date, books on low-cost or 'frugal innovation' have been practitioner-oriented and largely based on anecdotal evidence. This ground-breaking book provides a scholarly understanding of frugal innovation, drawing on empirical research. The resulting theoretical framework provides a basis from...