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Social Science Computer Review
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Integrating Distance Into Mobility Triangle Typologies

Elizabeth R. Groff

Institute for Law and Justice, egroff{at}ilj.org

Tom McEwen

Institute for Law and Justice, tmmcewen{at}ilj.org

Achieving a more complete understanding of the behavioral aspects of homicide has great potential for developing more targeted intervention and prevention strategies. One avenue to increased understanding is through the study of the spatial behavior of the parties involved. Mobility triangles have been used to describe the spatial relationships and develop a spatial typology of crime events. Mobility triangles enable the classification of crimes into types based on the relative locations of offender home address, victim home address, and homicide location. This work focuses on the crime of homicide and examines the 2,773 mobility triangles developed from homicide events in Washington, D.C. The research extends the traditional mobility triangle by defining and analyzing the explanatory power of a new type of mobility triangles based on distances. The analysis compares the output of the area-based traditional mobility triangle typology with that of a distance-based mobility triangle typology.

Key Words: geographic information systems • spatial typology • homicide • geometry • opportunity theory

Social Science Computer Review, Vol. 25, No. 2, 210-238 (2007)
DOI: 10.1177/0894439307298924
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