The spflow package allows to estimate spatial econometric interaction models. It is designed to exploit the relational structure of flow data, reducing the computational burden and memory requirements.

Installation

You can install development version from GitHub with:

# install.packages("devtools")
devtools::install_github("LukeCe/spflow")

Example

The package provides a new sp_multi_network-class that combines information on the origins, the destinations, and the origin-destination pairs. Once this object is created, we can estimate an interaction model with the spflow() function. The package vignette contains a more detailed example.

library("spflow")
spflow(y9 ~ . + G_(DISTANCE), multi_net_usa_ge)
#> --------------------------------------------------
#> Spatial interaction model estimated by: MLE  
#> Autocorrelation structure: model_9 (SDM)  
#> Observations: 256  
#> 
#> --------------------------------------------------
#> Coefficients:
#>                 est    sd  t.stat  p.value
#> rho_d          0.48  0.03   15.75     0.02
#> rho_o          0.36  0.03   10.59     0.03
#> rho_w         -0.25  0.04   -5.95     0.05
#> (Intercept)   10.00  1.92    5.21     0.06
#> (Intra)       11.32  3.07    3.69     0.08
#> DEST_X         0.94  0.06   14.97     0.02
#> DEST_X.lag1    0.62  0.11    5.80     0.05
#> ORIG_X        -0.78  0.04  -21.20     0.02
#> ORIG_X.lag1   -0.32  0.08   -3.93     0.08
#> INTRA_X        1.95  0.08   23.98     0.01
#> INTRA_X.lag1  -0.34  0.19   -1.76     0.16
#> DISTANCE      -2.80  0.34   -8.25     0.04
#> 
#> --------------------------------------------------
#> R2_corr: 0.9927709

License

GPL 3