{"id":52599,"date":"2025-04-22T14:12:53","date_gmt":"2025-04-22T12:12:53","guid":{"rendered":"https:\/\/www.accuracy.com\/?p=52599"},"modified":"2025-05-07T10:49:38","modified_gmt":"2025-05-07T08:49:38","slug":"a-quelles-conditions-la-demographie-peut-elle-etre-au-service-de-leconomie","status":"publish","type":"post","link":"https:\/\/www.accuracy.com\/fr\/under-what-conditions-can-demography-serve-the-economy\/","title":{"rendered":"Dans quelles conditions la d\u00e9mographie peut-elle servir l'\u00e9conomie ?"},"content":{"rendered":"<p><strong>Qu'est-ce que la d\u00e9mographie ?<\/strong><\/p>\n<p>Une r\u00e9ponse, \u00e0 la fois rigoureuse et simple, pourrait \u00eatre la suivante : <strong>l'\u00e9tude quantitative des populations humaines et de leur dynamique,<\/strong> fond\u00e9e sur les composantes de la f\u00e9condit\u00e9, des modes de vie, des migrations, du vieillissement et de la mortalit\u00e9. Une exp\u00e9rience de vox pop dans la France d'aujourd'hui aboutirait probablement \u00e0 un point de vue diff\u00e9rent, avec un taux de natalit\u00e9 en baisse, une population vieillissante et des inqui\u00e9tudes quant \u00e0 l'afflux important de migrants. <strong>Dans ce contexte, il est difficile de ne pas \u00eatre tent\u00e9 de tirer deux conclusions de \"bon sens\" : <\/strong>la dynamique \u00e9conomique ne peut que s'affaiblir et le pays risque de \"perdre son \u00e2me\".<\/p>\n<p><strong>O\u00f9 en sont les grandes tendances d\u00e9mographiques et quels sont leurs liens avec l'\u00e9conomie ?<\/strong> Examinons les pays \u00e0 haut revenu (selon la Banque mondiale, ils ont un revenu national brut par habitant sup\u00e9rieur \u00e0 13 845 USD - chiffres pour 2022 ; en bas du classement, le Chili est \u00e0 un peu plus de 15 000, et en haut, la Suisse est \u00e0 plus de 95 000 ; pour information, les \u00c9tats-Unis sont \u00e0 77 000 et la France \u00e0 45 000).<\/p>\n<p><strong>La population totale du groupe sera de 1,26 milliard en 2023, contre 693 millions en 1950. <\/strong>(\u00e0 titre de comparaison, les niveaux respectifs pour le monde sont de 8,16 milliards et 2,49 milliards). Selon le sc\u00e9nario m\u00e9dian des Nations unies, un pic de 1,29 milliard d'habitants serait atteint en 2038, et en 2100, il y aurait 1,25 milliard d'habitants (pour l'ensemble du monde, le pic serait atteint en 2081 avec 10,29 milliards, avant de redescendre \u00e0 10,18 milliards en 2100).<\/p>\n<p><strong>Pour ces pays \u00e0 hauts revenus, le nombre d'habitants n'augmente pratiquement plus.<\/strong> Un changement majeur est m\u00eame en train de se produire sous nos yeux : la tranche d'\u00e2ge des 25-64 ans culmine en 2023 \u00e0 671 millions. Cette tranche d'\u00e2ge est en train de se r\u00e9duire et ne devrait plus compter que 578 millions de personnes en 2100. <strong>En fait, le seul groupe en expansion est celui des 65 ans et plus ; les moins de 25 ans sont en d\u00e9clin depuis 1973. <\/strong><\/p>\n<p><strong>Moins d'adultes et moins de jeunes - <\/strong>ce n'est pas un bon message en ce qui concerne les perspectives de la population en \u00e2ge de travailler ! N\u00e9anmoins, il faut garder \u00e0 l'esprit que les tendances mondiales sont plus favorables.<\/p>\n<p><strong>La tranche d'\u00e2ge 25-64 ans devrait continuer \u00e0 cro\u00eetre jusqu'en 2070<\/strong> (5 milliards contre 4 milliards aujourd'hui), compensant largement le lent d\u00e9clin du groupe des moins de 25 ans (3,15 milliards en 2070 contre 3,28 milliards en 2023).  Cela dit, la taille du groupe des 65 ans et plus augmente \u00e9galement.<\/p>\n<p><a href=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-scaled.png\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-52606 size-full\" src=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-scaled.png\" alt=\"\" width=\"2560\" height=\"860\" srcset=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-scaled.png 2560w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-300x101.png 300w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-1024x344.png 1024w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-768x258.png 768w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-1536x516.png 1536w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-2048x688.png 2048w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/11-18x6.png 18w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/a><\/p>\n<p><strong>Concentrons-nous un peu plus sur les pays \u00e0 hauts revenus et essayons de mesurer l'ampleur de ce double mouvement : <\/strong>une faible augmentation de la population totale (+2,3% d'ici 2038, soit +0,15% par an) et une l\u00e9g\u00e8re diminution de la population en \u00e2ge de travailler (-2,9% sur 15 ans, soit-0,2% en moyenne annuelle). <strong>Quel sera l'impact sur la croissance mondiale ?<\/strong> L'analyse \u00e9conomique repose sur l'id\u00e9e que, sur le long terme, le rythme de la croissance d\u00e9pend de l'importance des facteurs de production utilis\u00e9s (traditionnellement, le capital et le travail) et de leur efficacit\u00e9 (la productivit\u00e9 de chacun d'entre eux).<\/p>\n<p>La d\u00e9composition macro\u00e9conomique prend le plus souvent la forme de l'\u00e9quation suivante : variation (%) du PIB = variation des heures travaill\u00e9es (%) + variation de la productivit\u00e9 horaire du travail (%).<\/p>\n<p>Il ne faut pas oublier que le nombre d'heures travaill\u00e9es d\u00e9pend \u00e0 la fois de la main-d'\u0153uvre employ\u00e9e et de la dur\u00e9e moyenne du travail. <strong>Bien qu'elle ne soit pas directe, il existe une relation entre la croissance \u00e9conomique et la croissance d\u00e9mographique.<\/strong> Sur une tr\u00e8s longue p\u00e9riode et au niveau mondial, le rapport est \u00e0 peu pr\u00e8s le m\u00eame, \u00e0 savoir 2 (l'\u00e9conomie) pour 1 (la population). <strong>Gr\u00e2ce au miracle de la productivit\u00e9, 1 point de pourcentage de croissance d\u00e9mographique contribue \u00e0 2 points de pourcentage de croissance \u00e9conomique. <\/strong><\/p>\n<p><strong>Une d\u00e9mographie plus dynamique favoriserait alors des gains de productivit\u00e9 plus \u00e9lev\u00e9s<\/strong> et donc encore plus de croissance. L'explication r\u00e9side dans les attentes des producteurs. La perception d'une demande finale des m\u00e9nages structurellement plus \u00e9lev\u00e9e incite \u00e0 multiplier les projets d'investissement. Comme souvent, capacit\u00e9 et productivit\u00e9 sont li\u00e9es. Mais attention au caract\u00e8re r\u00e9versible de la relation : une demande anticip\u00e9e plus faible, pour des raisons d\u00e9mographiques, r\u00e9duit les d\u00e9cisions d'investissement. La productivit\u00e9 est moins performante et le ralentissement de la croissance \u00e9conomique peut \u00eatre plus marqu\u00e9 que celui de la population.<\/p>\n<p><strong>Il existe des exceptions \u00e0 cette \"loi d'airain\". <\/strong>\u00c0 l'\u00e9chelle mondiale, entre les d\u00e9cennies 1990 et 2000, le taux de croissance de la population a ralenti (de +1,7% par an \u00e0 +1,3%), mais la croissance \u00e9conomique s'est acc\u00e9l\u00e9r\u00e9e (de +3,0% \u00e0 +3,5%). <strong>L'ouverture de l'\u00e9conomie chinoise au reste du monde et la r\u00e9volution de l'internet<\/strong> a stimul\u00e9 les attentes des entreprises, les investissements et, en fin de compte, la productivit\u00e9.<\/p>\n<p><a href=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-scaled.png\"><img decoding=\"async\" class=\"alignnone wp-image-52604 size-full\" src=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-scaled.png\" alt=\"\" width=\"2560\" height=\"978\" srcset=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-scaled.png 2560w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-300x115.png 300w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-1024x391.png 1024w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-768x294.png 768w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-1536x587.png 1536w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-2048x783.png 2048w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/22-18x7.png 18w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/a><\/p>\n<p><strong>Aujourd'hui, la double perspective d'un ralentissement d\u00e9mographique et d'une croissance \u00e9conomique plus faible a tout d'un sc\u00e9nario inacceptable. <\/strong>Comment \u00e0 la fois acc\u00e9l\u00e9rer la transition \u00e9nerg\u00e9tique, lutter efficacement contre le changement climatique, assurer les efforts de d\u00e9fense n\u00e9cessaires dans un monde plus dangereux, g\u00e9rer le vieillissement d\u00e9mographique et faire face au poids financier d'une dette croissante, le tout avec une croissance \u00e9conomique encore plus faible ?<\/p>\n<p><strong>Que peut-on faire ?<\/strong> Il est certain que nous devons chercher \u00e0 reproduire la premi\u00e8re d\u00e9cennie de ce si\u00e8cle ! Du c\u00f4t\u00e9 de la demande, il n'est pas facile de trouver une \u00e9conomie de l'ampleur de celle de la Chine qui s'ouvre \u00e0 nouveau au monde. <strong>Mais comment ignorer ce que nous disent les Nations unies ? <\/strong>D'ici 2050, alors que la population de l'Am\u00e9rique du Nord et de l'Europe r\u00e9unies stagnera, celle de l'Afrique devrait augmenter de deux tiers (pour atteindre pr\u00e8s de 2,5 milliards d'habitants). Son d\u00e9veloppement est essentiel, pour l'Afrique... et pour le monde entier !<\/p>\n<p><strong>Du c\u00f4t\u00e9 de l'offre, il y a trois leviers \u00e0 actionner. Tout d'abord, il y a la productivit\u00e9.<\/strong> Le d\u00e9fi est de faire en sorte qu'elle ne ralentisse pas ou, mieux encore, qu'elle augmente. L'\u00e9mergence et la diffusion des nouvelles technologies le permettront-elles ? <strong>Il y a ensuite le taux d'activit\u00e9 de la population existante.<\/strong> Cela signifie qu'il faut augmenter le nombre de personnes en \u00e2ge de travailler qui exercent une activit\u00e9 professionnelle, modifier l'\u00e9quilibre entre la vie professionnelle et la vie priv\u00e9e en faveur de la premi\u00e8re, et favoriser le d\u00e9veloppement des talents (meilleure formation tout au long de la vie et opportunit\u00e9s plus largement ouvertes \u00e0 tous les groupes de la soci\u00e9t\u00e9). Il est ind\u00e9niable que la mise en \u0153uvre de ces r\u00e9formes sera compliqu\u00e9e dans de nombreux pays. <strong>Enfin, il reste<\/strong> le d\u00e9fi encore plus grand de <strong>attirer davantage de travailleurs provenant de r\u00e9gions du monde plus dynamiques sur le plan d\u00e9mographique<\/strong> (principalement l'Afrique, mais aussi l'Asie - principalement l'Asie du Sud, l'Asie du Sud-Est et le Moyen-Orient). La p\u00e9nurie de main-d'\u0153uvre et le manque d'int\u00e9r\u00eat pour certaines professions vont dans ce sens, mais les d\u00e9bats politiques restent un obstacle de taille. Ces obstacles ne pourront \u00eatre surmont\u00e9s que si le processus est bien g\u00e9r\u00e9, avec la conviction que l'int\u00e9gration r\u00e9ussira. Comment rassurer des populations de plus en plus sceptiques ? Ou, pour le dire autrement, <strong>comment faire en sorte que l'\u00e9conomie et la politique travaillent en harmonie ?<\/strong><\/p>\n<p><a href=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-scaled.png\"><img decoding=\"async\" class=\"alignnone wp-image-52605 size-full\" src=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-scaled.png\" alt=\"\" width=\"2560\" height=\"1020\" srcset=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-scaled.png 2560w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-300x119.png 300w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-1024x408.png 1024w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-768x306.png 768w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-1536x612.png 1536w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-2048x816.png 2048w, https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/33-18x7.png 18w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/05\/Accuracy-Talks-Straight-12-UK.pdf\" target=\"_blank\" rel=\"noopener\">T\u00e9l\u00e9charger le PDF &gt;<\/a><\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<p><strong>Herv\u00e9 Goulletquer - Conseiller \u00e9conomique principal, Accuracy<\/strong><br \/>\n<em>Accuracy Talks Straight #12 - Point de vue \u00e9conomique<\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>What is demography? One answer, both rigorous and simple, could be as follows: the quantitative study of human populations and their dynamics, based on the components of fertility, lifestyles, migration, ageing and mortality. A vox pop experiment in France today would probably result in a different view, with a declining birth rate, an ageing population [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":52475,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[212,233],"tags":[386],"class_list":["post-52599","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-analysis","category-article","tag-accuracy-talks-straight-12"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Under what conditions can demography serve the economy? - Accuracy<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.accuracy.com\/fr\/a-quelles-conditions-la-demographie-peut-elle-etre-au-service-de-leconomie\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Under what conditions can demography serve the economy?\" \/>\n<meta property=\"og:description\" content=\"What is demography? One answer, both rigorous and simple, could be as follows: the quantitative study of human populations and their dynamics, based on the components of fertility, lifestyles, migration, ageing and mortality. A vox pop experiment in France today would probably result in a different view, with a declining birth rate, an ageing population [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.accuracy.com\/fr\/a-quelles-conditions-la-demographie-peut-elle-etre-au-service-de-leconomie\/\" \/>\n<meta property=\"og:site_name\" content=\"Accuracy\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-22T12:12:53+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-07T08:49:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.accuracy.com\/wp-content\/uploads\/2025\/04\/shutterstock_2248569293-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1440\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"dev\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"dev\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.accuracy.com\\\/en_gb\\\/under-what-conditions-can-demography-serve-the-economy\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.accuracy.com\\\/en_gb\\\/under-what-conditions-can-demography-serve-the-economy\\\/\"},\"author\":{\"name\":\"dev\",\"@id\":\"https:\\\/\\\/www.accuracy.com\\\/#\\\/schema\\\/person\\\/8cfdef62d7af45536d2b7b45979f72e7\"},\"headline\":\"Under what conditions can demography serve the economy?\",\"datePublished\":\"2025-04-22T12:12:53+00:00\",\"dateModified\":\"2025-05-07T08:49:38+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.accuracy.com\\\/en_gb\\\/under-what-conditions-can-demography-serve-the-economy\\\/\"},\"wordCount\":1079,\"publisher\":{\"@id\":\"https:\\\/\\\/www.accuracy.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.accuracy.com\\\/en_gb\\\/under-what-conditions-can-demography-serve-the-economy\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.accuracy.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/shutterstock_2248569293-scaled.jpg\",\"keywords\":[\"Accuracy Talks Straight 12\"],\"articleSection\":[\"Analysis\",\"Article\"],\"inLanguage\":\"fr-CA\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.accuracy.com\\\/en_gb\\\/under-what-conditions-can-demography-serve-the-economy\\\/\",\"url\":\"https:\\\/\\\/www.accuracy.com\\\/en_gb\\\/under-what-conditions-can-demography-serve-the-economy\\\/\",\"name\":\"Under what conditions can demography serve the economy? 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One answer, both rigorous and simple, could be as follows: the quantitative study of human populations and their dynamics, based on the components of fertility, lifestyles, migration, ageing and mortality. 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