A Spatial Autoregressive Poisson Gravity Model
In this article, a Poisson gravity model is introduced that incorporates spatial dependence of the explained variable without relying on restrictive distributional assumptions of the underlying data-generating process. The model comprises a spatially filtered component including the origin-, dest...
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Wiley-Blackwell
2013
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ndltd-VIENNA-oai-epub.wu-wien.ac.at-38492015-12-18T05:05:31Z A Spatial Autoregressive Poisson Gravity Model Sellner, Richard Fischer, Manfred M. Koch, Matthias In this article, a Poisson gravity model is introduced that incorporates spatial dependence of the explained variable without relying on restrictive distributional assumptions of the underlying data-generating process. The model comprises a spatially filtered component including the origin-, destination-, and origin-destination-specific variables and a spatial residual variable that captures origin- and destination-based spatial autocorrelation. We derive a two-stage nonlinear least-squares (NLS) estimator (2NLS) that is heteroscedasticity- robust and, thus, controls for the problem of over- or underdispersion that often is present in the empirical analysis of discrete data or, in the case of overdispersion, if spatial autocorrelation is present. This estimator can be shown to have desirable properties for different distributional assumptions, like the observed flows or (spatially) filtered component being either Poisson or negative binomial. In our spatial autoregressive (SAR) model specification, the resulting parameter estimates can be interpreted as the implied total impact effects defined as the sum of direct and indirect spatial feedback effects. Monte Carlo results indicate marginal finite sample biases in the mean and standard deviation of the parameter estimates and convergence to the true parameter values as the sample size increases. In addition, this article illustrates the model by analyzing patent citation flows data across European regions. (authors' abstract) Wiley-Blackwell 2013 Article NonPeerReviewed en application/pdf http://epub.wu.ac.at/3849/1/Paper_style_mod.pdf http://dx.doi.org/10.1111/gean.12007 http://onlinelibrary.wiley.com/ http://dx.doi.org/10.1111/gean.12007 http://epub.wu.ac.at/3849/ |
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NDLTD |
language |
en |
format |
Others
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sources |
NDLTD |
description |
In this article, a Poisson gravity model is introduced that incorporates spatial dependence
of the explained variable without relying on restrictive distributional assumptions of the
underlying data-generating process. The model comprises a spatially filtered component
including the origin-, destination-, and origin-destination-specific variables and a spatial
residual variable that captures origin- and destination-based spatial autocorrelation. We
derive a two-stage nonlinear least-squares (NLS) estimator (2NLS) that is heteroscedasticity-
robust and, thus, controls for the problem of over- or underdispersion that often
is present in the empirical analysis of discrete data or, in the case of overdispersion, if
spatial autocorrelation is present. This estimator can be shown to have desirable properties
for different distributional assumptions, like the observed flows or (spatially) filtered component
being either Poisson or negative binomial. In our spatial autoregressive (SAR)
model specification, the resulting parameter estimates can be interpreted as the implied
total impact effects defined as the sum of direct and indirect spatial feedback effects. Monte
Carlo results indicate marginal finite sample biases in the mean and standard deviation of
the parameter estimates and convergence to the true parameter values as the sample size
increases. In addition, this article illustrates the model by analyzing patent citation flows
data across European regions. (authors' abstract) |
author |
Sellner, Richard Fischer, Manfred M. Koch, Matthias |
spellingShingle |
Sellner, Richard Fischer, Manfred M. Koch, Matthias A Spatial Autoregressive Poisson Gravity Model |
author_facet |
Sellner, Richard Fischer, Manfred M. Koch, Matthias |
author_sort |
Sellner, Richard |
title |
A Spatial Autoregressive Poisson Gravity Model |
title_short |
A Spatial Autoregressive Poisson Gravity Model |
title_full |
A Spatial Autoregressive Poisson Gravity Model |
title_fullStr |
A Spatial Autoregressive Poisson Gravity Model |
title_full_unstemmed |
A Spatial Autoregressive Poisson Gravity Model |
title_sort |
spatial autoregressive poisson gravity model |
publisher |
Wiley-Blackwell |
publishDate |
2013 |
url |
http://epub.wu.ac.at/3849/1/Paper_style_mod.pdf http://dx.doi.org/10.1111/gean.12007 |
work_keys_str_mv |
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_version_ |
1718154207145492480 |