{"id":189558,"date":"2023-05-03T09:54:25","date_gmt":"2023-05-03T13:54:25","guid":{"rendered":"https:\/\/ibkrcampus.com\/?p=189558"},"modified":"2024-04-05T14:28:26","modified_gmt":"2024-04-05T18:28:26","slug":"echoice2-r-package","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/ibkr-quant-news\/echoice2-r-package\/","title":{"rendered":"echoice2 R Package"},"content":{"rendered":"\n<p>The echoice2 R package implements economic models of choice. This includes discrete choice and volumetric choice models with and without screening rules. These models can be used for analyzing data from choice experiments (aka conjoint analysis) or individual-level transaction data such as household-level panel data.<br><br>All models are \u201cHierarchical Bayes\u201d models, and estimated using Markov chain Monte Carlo (MCMC). When available, OpenMP is used to parallelize the samplers. The source code prioritizes simplicity over elegance, and hopefully other authors of economic choice models can contribute to the package. The main motivation of this package is to make economic models of choice more accessible.<br><br>The foundations of economic choice models are described in the chapter \u201cEconomic foundations of conjoint analysis\u201d (Allenby, Hard, Rossi, 2019) &lt;doi:10.1016\/bs.hem.2019.04.002&gt;.&nbsp; Economic models of choice comprise a microeconomic model of individual behavior, or stochastic specification and model of heterogeneity. Grounding models in theory matters when the primary purpose of an analysis is to counterfactualize.<br><br>Non-compensatory choice and screening is described in the paper &#8220;Conjunctive Screening in Models of Multiple Discreteness&#8221; (Kim, Hardt, Kim, Allenby, 2022) &lt;doi:10.1016\/j.ijresmar.2022.04.001&gt;. The case of changing assortment size is discussed in \u201cVolumetric Demand and Set Size Variation\u201d (Hard,t Kurz, 2020) &lt;doi:10.2139\/ssrn.3418383&gt;. The package might also be referenced in other upcoming publications. One of the package vignettes shows how to import data from the seminal \u201cbayesm\u201d <a href=\"https:\/\/cran.r-project.org\/package=bayesm\">https:\/\/cran.r-project.org\/package=bayesm<\/a> package.<br><br>echoice2 is available on CRAN <a href=\"https:\/\/CRAN.R-project.org\/package=echoice2\">https:\/\/CRAN.R-project.org\/package=echoice2<\/a>. Two vignettes demonstrate how to use the package to estimate models on conjoint-style data and generate predictions that could be used for \u201cmarket\u201d simulation:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/cran.r-project.org\/web\/packages\/echoice2\/vignettes\/Importing_lol_data.html\">Importing list-of-lists choice data and discrete choice modeling with echoice2<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cran.r-project.org\/web\/packages\/echoice2\/vignettes\/Modeling_volumetric_demand.html\">Volumetric Demand and Conjunctive Screening with echoice2<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The echoice2 R package implements economic models of choice. This includes discrete choice and volumetric choice models with and without screening rules.<\/p>\n","protected":false},"author":1141,"featured_media":204587,"comment_status":"open","ping_status":"closed","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[339,343,338,342],"tags":[806,15200,7811,6591],"contributors-categories":[15189],"class_list":{"0":"post-189558","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-data-science","8":"category-programing-languages","9":"category-ibkr-quant-news","10":"category-r-development","11":"tag-data-science","12":"tag-echoice2-r-package","13":"tag-r-rstats","14":"tag-rstats","15":"contributors-categories-dr-nino-hardt"},"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>echoice2 R Package | IBKR Quant<\/title>\n<meta name=\"description\" content=\"The echoice2 R package implements economic models of choice. 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This includes discrete choice and volumetric choice models with and without screening rules.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.interactivebrokers.com\/campus\/ibkr-quant-news\/echoice2-r-package\/\" \/>\n<meta property=\"og:site_name\" content=\"IBKR Campus US\" \/>\n<meta property=\"article:published_time\" content=\"2023-05-03T13:54:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-05T18:28:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2023\/05\/quant-econometrics.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"563\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Dr. Nino Hardt\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dr. Nino Hardt\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\n\t    \"@context\": \"https:\\\/\\\/schema.org\",\n\t    \"@graph\": [\n\t        {\n\t            \"@type\": \"NewsArticle\",\n\t            \"@id\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/#article\",\n\t            \"isPartOf\": {\n\t                \"@id\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/\"\n\t            },\n\t            \"author\": {\n\t                \"name\": \"Dr. Nino Hardt\",\n\t                \"@id\": \"https:\\\/\\\/ibkrcampus.com\\\/campus\\\/#\\\/schema\\\/person\\\/fb58d61dc7ef3f15c112a28de91f26bb\"\n\t            },\n\t            \"headline\": \"echoice2 R Package\",\n\t            \"datePublished\": \"2023-05-03T13:54:25+00:00\",\n\t            \"dateModified\": \"2024-04-05T18:28:26+00:00\",\n\t            \"mainEntityOfPage\": {\n\t                \"@id\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/\"\n\t            },\n\t            \"wordCount\": 294,\n\t            \"commentCount\": 0,\n\t            \"publisher\": {\n\t                \"@id\": \"https:\\\/\\\/ibkrcampus.com\\\/campus\\\/#organization\"\n\t            },\n\t            \"image\": {\n\t                \"@id\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/#primaryimage\"\n\t            },\n\t            \"thumbnailUrl\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2023\\\/05\\\/quant-econometrics.jpg\",\n\t            \"keywords\": [\n\t                \"Data Science\",\n\t                \"echoice2 R Package\",\n\t                \"R rstats\",\n\t                \"rstats\"\n\t            ],\n\t            \"articleSection\": [\n\t                \"Data Science\",\n\t                \"Programming Languages\",\n\t                \"Quant\",\n\t                \"R Development\"\n\t            ],\n\t            \"inLanguage\": \"en-US\",\n\t            \"potentialAction\": [\n\t                {\n\t                    \"@type\": \"CommentAction\",\n\t                    \"name\": \"Comment\",\n\t                    \"target\": [\n\t                        \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/#respond\"\n\t                    ]\n\t                }\n\t            ]\n\t        },\n\t        {\n\t            \"@type\": \"WebPage\",\n\t            \"@id\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/\",\n\t            \"url\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/\",\n\t            \"name\": \"echoice2 R Package | IBKR Campus US\",\n\t            \"isPartOf\": {\n\t                \"@id\": \"https:\\\/\\\/ibkrcampus.com\\\/campus\\\/#website\"\n\t            },\n\t            \"primaryImageOfPage\": {\n\t                \"@id\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/#primaryimage\"\n\t            },\n\t            \"image\": {\n\t                \"@id\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/ibkr-quant-news\\\/echoice2-r-package\\\/#primaryimage\"\n\t            },\n\t            \"thumbnailUrl\": \"https:\\\/\\\/www.interactivebrokers.com\\\/campus\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2023\\\/05\\\/quant-econometrics.jpg\",\n\t            \"datePublished\": \"2023-05-03T13:54:25+00:00\",\n\t            \"dateModified\": \"2024-04-05T18:28:26+00:00\",\n\t            \"description\": \"The echoice2 R package implements economic models of choice. 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