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geostan 0.8.0
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@ConnorDonegan ConnorDonegan released this 18 Nov 12:44
· 9 commits to main since this release
v0.8.0
fe22d2b

New Features

Spatial econometric models and better sampling for hierarchical spatial auto-regressive models:

  • geostan now provides more support for spatial econometric models: spatial error (SEM), spatially-lagged dependent variable (SLM), and the ‘Durbinized’ versions of each (SDEM, SDLM). Methods for calculating impacts are and predicted values for SLM/SDLM are included. Users can also draw from the posterior predictive distributions of these models: see geostan::stan_sar and geostan::impacts.
  • geostan::sim_sar can now simulate draws from the spatial lag model as well as the spatial error model.
  • The CAR and SAR models, when placed in a Poisson or binomial model for count data, can sample poorly when the data is sparse. This can usually be fixed using the new zmp option which switches CAR/SAR models to a zero-mean parameterization. Details are in the vignette on building custom spatial models.

Bug fix

  • A bug was introduced to v0.7.0 which added a small bias to coefficient estimates which only appeared when the slx option was used. This has been fixed.

Other stuff

  • A set of Monte Carlo analyses have been added to the package tests, verifying that the estimates match expectations. This is also part of a process of moving away from the ‘testthat’ package.
  • The package documentation and vignettes have also been improved a little bit.

Upcoming release

  • The new vignette on 'Spatial analysis with geostan' causes installation to fail on older versions of windows and mac os, so v0.8.1 will come out with a patch for this in the coming days.
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