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9 results for “from:Denys Dukhovnov”

Fitting hierarchical spatial panel data models
Denys Dukhovnov · Oct 1, 2022 · r-sig-geo

Hello, I am aiming to run an SLX or and SDEM local spillover type spatial model and I am looking for advice on existing methods and their implementations.? I have a panel data with about 30 years of observation and...

Error in splm random effects ML model
Denys Dukhovnov · Feb 15, 2023 · r-sig-geo

Dear community, I am trying to run a spatial panel random effects SEM model using splm package on a balanced spatial panel of N = 2472 and T = 4, and weights are based on k = 6 nearest neighbors. I encounter this...

Impacts for panel SDM and SDEM models in splm (revisited)
Denys Dukhovnov · Mar 7, 2023 · r-sig-geo

Dear community, Almost 7 years ago there was a question on panel SDM model impacts, as run following the models in splm package. https://stat.ethz.ch/pipermail/r-sig-geo/2016-April/024326.html The answer given by Roger...

Error in impacts() after lagsarlm (spdep package)
Denys Dukhovnov · Nov 13, 2019 · r-sig-geo

I posted this question on StackOverflow a while back but received no answer.? I have 9,150 polygons in my data set. I was trying to run a spatial autoregressive model (SAR) in?spdep?to test spatial dependence of my...

More efficient raster extraction
Denys Dukhovnov · Sep 14, 2015 · r-sig-geo

Hello, I am trying to extract 300 meter raster cell values over Census block polygons for each of the US states. Because 300m cells are much larger than typical urban blocks, I had to specify "small" option (as shown below...

Help needed with extraction of raster statistics by polygons
Denys Dukhovnov · Aug 25, 2015 · r-sig-geo

Hello all! I need to spatially calculate 30-meter grid raster mean over US Census blocks in North East region (approx. 1.9 mln street blocks/polygons). I came up with the script that runs in parallel, but it still...

Error in splm random effects ML model
Denys Dukhovnov · Feb 15, 2023 · r-sig-geo

Dear Roger,? Yes, I am running R version 4.2.2 and Windows 10 OS x64, packages used updated to the latest version on CRAN. The panel data I am using is complete for all the variables and spatial weights...

Error in splm random effects ML model
Denys Dukhovnov · Feb 16, 2023 · r-sig-geo

Dear Roger, This is incredibly helpful and much appreciated! I re-ran the model using the method = "BFGS" argument and I can confirm that it worked.? Best regards, Denys On Thursday, February 16, 2023 at 03:49:45 AM EST...

Adjusting for HAC in splm models
Denys Dukhovnov · Nov 21, 2023 · r-sig-geo

Dear community, I am trying to interpret and report the results of my spatial panel analysis, but I am running into issues while attempting to accommodate for spatial and serial autocorrelation and clustering in the errors. What implemented solutions currently...

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