{"id":403,"date":"2026-04-27T11:25:29","date_gmt":"2026-04-27T10:25:29","guid":{"rendered":"https:\/\/www.farhi-innovation-lab.fr\/?post_type=publication&#038;p=403"},"modified":"2026-06-02T14:23:26","modified_gmt":"2026-06-02T13:23:26","slug":"good-rents-versus-bad-rents-rd-misallocation-and-growth","status":"publish","type":"publication","link":"https:\/\/www.farhi-innovation-lab.fr\/fr\/publication\/good-rents-versus-bad-rents-rd-misallocation-and-growth\/","title":{"rendered":"Good Rents versus Bad Rents: R&amp;D Misallocation and Growth"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Firm price-cost markups may reflect (a) bigger step sizes from quality<br>innovations that confer significant knowledge spillovers onto other firms,<br>and\/or (b) higher process efficiency than competing firms or other factors<br>which bear no obvious knowledge externality. We write down an<br>endogenous growth model with innovation step size and process efficiency<br>as alternative sources of markup heterogeneity. We then use price and<br>productivity data across firms in French manufacturing to infer firm step<br>sizes and process efficiency. We show that purely size-based R&amp;D<br>subsidies, such as those seen in France, are a poor approximation to the<br>social planner\u2019s solution. Instead, research subsidies should favor firms<br>with big step sizes, whether the firms are large or small.<\/p>","protected":false},"excerpt":{"rendered":"<p>Firm price-cost markups may reflect (a) bigger step sizes from qualityinnovations that confer significant knowledge spillovers onto other firms,and\/or (b) higher process efficiency than competing firms or other factorswhich bear no obvious knowledge externality. We write down anendogenous growth model with innovation step size and process efficiencyas alternative sources of markup heterogeneity. We then use [&hellip;]<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":true},"thematique":[49,47],"type-de-publication":[45],"class_list":["post-403","publication","type-publication","status-publish","hentry","thematique-growth","thematique-innovation","type-de-publication-working-paper"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Good Rents versus Bad Rents: R&amp;D Misallocation and Growth - Farhi Innovation Lab<\/title>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Good Rents versus Bad Rents: R&amp;D Misallocation and Growth - Farhi Innovation Lab\" \/>\n<meta property=\"og:description\" content=\"Firm price-cost markups may reflect (a) bigger step sizes from qualityinnovations that confer significant knowledge spillovers onto other firms,and\/or (b) higher process efficiency than competing firms or other factorswhich bear no obvious knowledge externality. We write down anendogenous growth model with innovation step size and process efficiencyas alternative sources of markup heterogeneity. We then use [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.farhi-innovation-lab.fr\/fr\/publication\/good-rents-versus-bad-rents-rd-misallocation-and-growth\/\" \/>\n<meta property=\"og:site_name\" content=\"Farhi Innovation Lab\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-02T13:23:26+00:00\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/publication\\\/good-rents-versus-bad-rents-rd-misallocation-and-growth\\\/\",\"url\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/publication\\\/good-rents-versus-bad-rents-rd-misallocation-and-growth\\\/\",\"name\":\"Good Rents versus Bad Rents: R&amp;D Misallocation and Growth - Farhi Innovation Lab\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/#website\"},\"datePublished\":\"2026-04-27T10:25:29+00:00\",\"dateModified\":\"2026-06-02T13:23:26+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/publication\\\/good-rents-versus-bad-rents-rd-misallocation-and-growth\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/publication\\\/good-rents-versus-bad-rents-rd-misallocation-and-growth\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/publication\\\/good-rents-versus-bad-rents-rd-misallocation-and-growth\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Publications\",\"item\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/publications\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Good Rents versus Bad Rents: R&amp;D Misallocation and Growth\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/#website\",\"url\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/\",\"name\":\"Farhi Innovation Lab\",\"description\":\"Economics of Institutions, Innovation, and Growth Chair\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/#organization\",\"name\":\"Farhi Innovation Lab\",\"alternateName\":\"Farhi Innovation Lab\",\"url\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/web-app-manifest-512x512-1.png\",\"contentUrl\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/web-app-manifest-512x512-1.png\",\"width\":512,\"height\":512,\"caption\":\"Farhi Innovation Lab\"},\"image\":{\"@id\":\"https:\\\/\\\/www.farhi-innovation-lab.fr\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Good Rents versus Bad Rents: R&amp;D Misallocation and Growth - Farhi Innovation Lab","robots":{"index":"noindex","follow":"follow"},"og_locale":"fr_FR","og_type":"article","og_title":"Good Rents versus Bad Rents: R&amp;D Misallocation and Growth - Farhi Innovation Lab","og_description":"Firm price-cost markups may reflect (a) bigger step sizes from qualityinnovations that confer significant knowledge spillovers onto other firms,and\/or (b) higher process efficiency than competing firms or other factorswhich bear no obvious knowledge externality. 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