Impulse-Response Function Analysis for Agent-Based Models R package LSDirf version 0.1.4 Performing impulse-response function (IRF) analysis of relevant variables of agent-based simulation models, in particular for models described in 'LSD' format. Based on the data produced by the simulation model, it performs both linear and state-dependent IRF analysis, providing the tools required by the Counterfactual Monte Carlo (CMC) methodology (Amendola and Pereira (2024) <doi:10.1016/j.jebo.2024.106811>), including state identification and sensitivity. CMC proposes retrieving the causal effect of shocks by exploiting the opportunity to directly observe the counterfactual in a fully controlled experimental setup. 'LSD' (Laboratory for Simulation Development) is free software available at <https://www.labsimdev.org/>). Software Depends: R (>= 4.0.0) Imports: stats, utils, grDevices, graphics, boot, digest, gplots, abind, partykit, randomForest Suggests: LSDinterface, LSDsensitivity Marcelo C. Pereira <mcper@unicamp.br> Comprehensive R Archive Network (CRAN) Marcelo C. Pereira [aut, cre] (ORCID: <https://orcid.org/0000-0002-8069-2734>), Marco Amendola [aut] (ORCID: <https://orcid.org/0000-0003-3056-5558>) GPL-3 2026-04-08 application/tgz https://CRAN.R-project.org/package=LSDirf doi:10.32614/CRAN.package.LSDirf en-US