This paper considers the most important aspects of model uncertainty for spatial regression
models, namely the appropriate spatial weight matrix to be employed and the appropriate explanatory vari-
ables. We focus on the spatial Durbin model (SDM) specification in this study that nests most models used
in the regional growth literature, and develop a simple Bayesian model averaging approach that provides a
unified and formal treatment of these aspects of model uncertainty for SDM growth models. The approach
expands on the work by LeSage and Fischer (2008) by reducing the computational costs through the use
of Bayesian information criterion model weights and a matrix exponential specification of the SDM model.
The spatial Durbin matrix exponential model has theoretical and computational advantages over the spatial
autoregressive specification due to the ease of inversion, differentiation and integration of the matrix expo-
nential. In particular, the matrix exponential has a simple matrix determinant which vanishes for the case of
a spatial weight matrix with a trace of zero (LeSage and Pace 2007). This allows for a larger domain of spatial
growth regression models to be analysed with this approach, including models based on different classes of
spatial weight matrices. The working of the approach is illustrated for the case of 32 potential determinants
and three classes of spatial weight matrices (contiguity-based, k-nearest neighbor and distance-based spatial
weight matrices), using a dataset of income per capita growth for 273 European regions. (authors' abstract)
| Identifer | oai:union.ndltd.org:VIENNA/oai:epub.wu-wien.ac.at:4418 |
| Date | 06 1900 |
| Creators | Piribauer, Philipp, Fischer, Manfred M. |
| Publisher | Wiley-Blackwell |
| Source Sets | Wirtschaftsuniversität Wien |
| Language | English |
| Detected Language | English |
| Type | Article, PeerReviewed |
| Format | application/pdf |
| Relation | http://dx.doi.org/10.1111/gean.12057, http://onlinelibrary.wiley.com/, http://olabout.wiley.com/WileyCDA/Section/id-828039.html, http://epub.wu.ac.at/4418/ |
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