“…These spatiotemporal interactions can be specified in dependent variables as in Su and Yang (2007), Yu et al (2008), Elhorst (2010) among others. They can also be specified in the error components such as in Elhorst (2004), Baltagi et al (2007), LeSage (2011, 2012) ✩ We would like to thank participants of 18th International Conference on Panel Data (Paris, 2012), International Conference on Policy Analysis Using Modern Econometric Methods (Beijing, 2012), 1st China Meeting of the Econometric Society (Beijing, 2013), seminars at South Western University of Finance and Economics (Chengdu, 2013), two anonymous referees and the co-editor, Professor Peter M. Robinson, of this journal for helpful comments.…”