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The Stata Journal
Volume 10 Number 4: pp. 585-605

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Making spatial analysis operational: Commands for generating spatial-effect variables in monadic and dyadic data

Eric Neumayer
Department of Geography and Environment
London School of Economics and Political Science
London, UK
Centre for the Study of Civil War
International Peace Research Institute
Oslo, Norway
[email protected]
Thomas Plümper
Department of Government
University of Essex
Colchester, UK
Centre for the Study of Civil War
International Peace Research Institute
Oslo, Norway
[email protected]
Abstract.  Spatial dependence exists whenever the expected utility of one unit of analysis is affected by the decisions or behavior made by other units of analysis. Spatial dependence is ubiquitous in social relations and interactions. Yet, there are surprisingly few social science studies accounting for spatial dependence. This holds true for settings in which researchers use monadic data, where the unit of analysis is the individual unit, agent, or actor, and even more true for dyadic data settings, where the unit of analysis is the pair or dyad representing an interaction or a relation between two individual units, agents, or actors. Dyadic data offer more complex ways of modeling spatial-effect variables than do monadic data. The commands described in this article facilitate spatial analysis by providing an easy tool for generating, with one command line, spatial-effect variables for monadic contagion as well as for all possible forms of contagion in dyadic data.
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View all articles by these authors: Eric Neumayer, Thomas Plümper

View all articles with these keywords: spspc, spundir, spmon, spdir, spagg, spatial dependence, spatial analysis, contagion, spatial lag, spatial error, monadic data, dyadic data

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