This vignette demonstrates how to use the Structural Topic Model, stm, R package. The Structural Topic Model (STM) allows researchers to estimate a topic model which includes document-level meta-data. The stm package provides a range of features from model selection to extensive plotting and visualization options.

splm is an R package for estimating and testing various spatial panel data specifications. We consider the implementation of both maximum likelihood and generalized moments estimators in the context of fixed as well as random effects spatial panel data models. This paper is a general description of splm and all functionalities are illustrated by application to Munnel (1990) data on 48 US States...

In the present note we demonstrate how to implement the Lee and Yu (2010) procedure for fixed effects spatial panel data models available from the R (R Development Core Team 2012) package splm (Millo and Piras 2012). Additionally, we also show how to compute the impact estimates introduced by Kelejian, Tavlas, and Hondroyiannis (2006) and formalized in LeSage and Pace (2009). Unlike Matlab (MAT...

We discuss how to apply statistical tests to compare different ACT-R models, by treating the ACT-R models as approximations of the mathematical models underlying them. To this end, we propose a method for deciding how many times to run a model, and a method for determining how many free parameters each model has.

Attention is a complex multilevel system subserved by at least three interacting attentional networks in the brain. This paper describes a multilevel computational model of attentional networks, developed in both the symbolic architecture of ACT-R and the connectionist framework of leabra. We evaluated the model using the Attentional Networks Test and the simulation results fitted the empirical...

October 15, 2009 Version 3.1-96 Date 2009-10-15 Priority recommended Title Linear and Nonlinear Mixed Effects Models Author Jose Pinheiro (S version), Douglas Bates (up to 2007), Saikat DebRoy (up to 2002), Deepayan Sarkar (up to 2005), the R Core team. Maintainer R-core <R-core@R-pr...