In October 2021, a historic two-pillar international agreement was reached among 137 countries of the OECD/G20 Inclusive Framework on BEPS to address the twin challenges of globalization and digitalization. Pillar One will reallocate tax revenues to the country of the consumer. Pillar Two...

The nature of urban neighborhoods, neighborhood effects, and the dynamics of residential segregation are important themes in contemporary sociological inquiry. Agent-based models of social systems have been widely applied in this context. However, both applied and model-based research in these...

Decision support systems are deployed in a wide variety of business applications using a variety of core technologies and programming languages. One of the more promising technologies to evolve in recent year has been the semantic web. The semantic web aims to create more intelligent and machine...

A new type of dynamic spatial model is described: graph-cellular automatoa (graph-CA). First, the proximal model of space and geo-algebra are briefly introduced. Then, the graph-CA model is described, with an emphasis on understanding it as a reworking of the proximal model of space and also of...

Pedestrian movement models have been developed since the 1970s. A review of the literature shows that such models have been developed to explain and predict macro, meso, and micro movement patterns. However, recent developments in modelling techniques, and especially advances in agent-based...

Agent-based models (ABMs) are an increasingly popular tool in the social sciences. This trend seems likely to continue, so that they will become widely used in geography and in urban and regional planning. We present an overview of examples of these models in the life sciences, economics,...

An isovist, or viewshed, is the area in a spatial environment directly visible from a location within the space. Here we show how a set of isovists can be used to generate a graph of mutual visibility between locations. We demonstrate that this graph can also be constructed without reference to...