Media type: E-Article Title: Testing Isotropy in Spatial Econometric Models Contributor: Arbia, Giuseppe; Bee, Marco; Espa, Giuseppe imprint: Informa UK Limited, 2013 Published in: Spatial Economic Analysis Language: English DOI: 10.1080/17421772.2013.804629 ISSN: 1742-1772; 1742-1780 Origination: Footnote: