{"type":"script","doc_desc":{"producers":[{"name":"Reproducibility WBG","abbr":"DECDI","affiliation":"World Bank - Development Impact Department","role":"Verification and preparation of metadata"}],"prod_date":"2026-11-06","version":"1"},"project_desc":{"authoring_entity":[{"name":"Brian William Stacy","affiliation":"World Bank Group","email":"bstacy@worldbank.org"},{"name":"Norbert Schady","affiliation":"World Bank Group","email":"nschady@worldbank.org"},{"name":"Joana Silva","affiliation":"World Bank Group","email":"jsilva@worldbank.org"},{"name":"Benoit Decerf","affiliation":"University of Namur","email":"benoit.decerf@unamur.be"},{"name":"Ritika D\u2019Souza","affiliation":"World Bank Group","email":"rdsouza@worldbank.org"}],"title_statement":{"title":"Reproducibility package for Measuring Human Capital Over the Life Cycle: The World Bank Human Capital Index Plus","idno":"RR_WLD_2026_806"},"data_statement":"The reproducibility package relies on one type of data: open data. For the source, access type, file location, and citation of each dataset, refer to the Datasets section and the README file.","software":[{"name":"R","version":"4.4.0"}],"scripts":[{"title":"Reproducibility package for Measuring Human Capital Over the Life Cycle: The World Bank Human Capital Index Plus","date":"2026-11","notes":"Computational reproducibility verified by Development Impact (DECDI) Analytics team, World Bank.","instructions":"See README in reproducibility package.","file_name":"RR_WLD_2026_806","zip_package":"RR_WLD_2026_806.zip","dependencies":"R dependencies are listed in the file renv.lock."}],"repository_uri":[{"name":"Reproducible Research Repository (World Bank)","uri":"https:\/\/reproducibility.worldbank.org"}],"production_date":"2026-11-06","abstract":"Global measures of human capital have attracted substantial attention from policymakers, but prominent measures capture only the human capital accumulated by age 18. Human capital continues to develop through tertiary education and work experience. This paper introduces the Human Capital Index Plus (HCI+), an extension of the World Bank Human Capital Index (HCI) that incorporates tertiary education and on-the-job learning. The HCI+ focuses on outcomes rather than inputs, aggregating health, education, and employment according to their contributions to lifetime earnings. The paper presents the conceptual framework and methodology underlying the index. The HCI+ data reveal that the average low- and middle-income country could raise a child's expected future earnings by roughly 50 percent by matching top performers at its income level.","geographic_units":[{"name":"World","code":"WLD"}],"keywords":[{"name":"Human Capital"},{"name":"Development Accounting"},{"name":"Education"},{"name":"Experience"},{"name":"Health"}],"topics":[{"id":"I1","uri":"https:\/\/www.aeaweb.org\/econlit\/jelCodes.php?view=jel","vocabulary":"Journal of Economic Literature (JEL)","name":"Health","parent_id":"I"},{"id":" I2","uri":"https:\/\/www.aeaweb.org\/econlit\/jelCodes.php?view=jel","vocabulary":"Journal of Economic Literature (JEL)","name":"Education and Research Institutions","parent_id":"I"},{"id":" O1","uri":"https:\/\/www.aeaweb.org\/econlit\/jelCodes.php?view=jel","vocabulary":"Journal of Economic Literature (JEL)","name":"Economic Development","parent_id":"O"},{"id":" O4","uri":"https:\/\/www.aeaweb.org\/econlit\/jelCodes.php?view=jel","vocabulary":"Journal of Economic Literature (JEL)","name":"Economic Growth and Aggregate Productivity","parent_id":"O"}],"output":[{"type":"Working Paper","description":"Policy Research Working Paper (PRWP)","title":"Measuring Human Capital Over the Life Cycle: The World Bank Human Capital Index Plus"}],"language":[{"name":"English","code":"EN"}],"technology_requirements":"Runtime: 1 minute.","disclaimer":"The materials in the reproducibility packages are distributed as they were prepared by the staff of the International Bank for Reconstruction and Development\/The World Bank. The findings, interpretations, and conclusions expressed in this event do not necessarily reflect the views of the World Bank, the Executive Directors of the World Bank, or the governments they represent. The World Bank does not guarantee the accuracy of the materials included in the reproducibility package.","license":[{"name":"MIT License","uri":"https:\/\/opensource.org\/license\/mit"},{"name":"World Bank IGO Rider","uri":"https:\/\/github.com\/worldbank\/metadata-editor\/blob\/main\/WB-IGO-RIDER.md"}],"contacts":[{"name":"Brian William Stacy","affiliation":"World Bank Group","email":"bstacy@worldbank.org"},{"name":"Reproducibility World Bank Group","affiliation":"World Bank Group","email":"reproducibility@worldbank.org"}],"datasets":[{"name":"Human Capital Index Plus ","note":"Filename: 01_raw_data\/hci_plus_index.csv. Country-level dataset of HCI+ totals, the health, education, and on-the-job learning components, and the underlying indicators (adult survival, stunting, schooling, harmonized learning outcomes, tertiary completion, labor force participation, unemployment, and wage employment) for 2010, 2015, 2020, and 2025, for both sexes combined, males, and females. Copied without modification from the worldbank\/HCI-Plus GitHub repository (03_output\/hci_plus\/hci_plus_index.csv, version of August 1, 2026). The paper uses the 2025 values for both sexes combined in all exhibits.","access_type":"Data is publicly available and included in the reproducibility package.","license":"Creative Commons Attribution 4.0 (CC BY 4.0)","license_uri":"https:\/\/www.worldbank.org\/ext\/en\/legal\/terms-conditions\/datasets","citation":"World Bank. (2026). Human Capital Index Plus [dataset]. World Bank Data Catalog, dataset 0067030. https:\/\/datacatalog.worldbank.org\/search\/dataset\/0067030\/human-capital-index-plus","uri":"https:\/\/datacatalog.worldbank.org\/search\/dataset\/0067030\/human-capital-index-plus"},{"name":"World Development Indicators (WDI)","note":"Filename: 01_raw_data\/wdi_for_hci_plus.csv. Total population (SP.POP.TOTL), GDP per capita, PPP in constant and current international dollars (NY.GDP.PCAP.PP.KD, NY.GDP.PCAP.PP.CD), and population ages 0 to 4 by sex (SP.POP.0004.FE, SP.POP.0004.MA), 2010 to 2024, downloaded through the World Bank API with the wbstats R package in March 2026. The file was built by 02_programs\/01_data_pull.R, which fills gaps with the nearest available year within each country, keeps 2010, 2015, 2020, and 2024, and constructs the population and GDP per capita variables. The paper uses 2024 population and GDP per capita as the 2025 reference values.","access_type":"Data is publicly available and included in the reproducibility package.","license":"Creative Commons Attribution 4.0 (CC BY 4.0)","license_uri":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","citation":"World Bank. (2026). World Development Indicators [dataset]. World Bank. Accessed March 2026. https:\/\/data.worldbank.org","uri":"https:\/\/data.worldbank.org"},{"name":"World Bank Country Metadata","note":"Filename: 01_raw_data\/wb_country_metadata.csv. Country list from the World Bank API (wb_countries function of the wbstats R package), downloaded in January 2026 by 02_programs\/01_data_pull.R and saved without modification. The paper uses country names, regions, and income groups.","access_type":"Data is publicly available and included in the reproducibility package.","license":"Creative Commons Attribution 4.0 (CC BY 4.0)","license_uri":"https:\/\/www.worldbank.org\/ext\/en\/legal\/terms-conditions\/datasets","citation":"World Bank. (2026). World Bank country metadata, World Bank API v2 [dataset]. World Bank. Accessed January 2026. https:\/\/api.worldbank.org\/v2\/country","uri":"https:\/\/api.worldbank.org\/v2\/country"}],"technology_environment":"Paper exhibits were reproduced on a computer with the following specifications:\n\u2022 OS: Windows 11 Enterprise\n\u2022 Processor: Intel(R) Xeon(R) Platinum 8562Y+ (2 processors)\n\u2022 Memory available: 128 GB","reproduction_instructions":"To reproduce the findings in this paper, a replicator must:\n1. Open `HCI-Plus-PRWP.Rproj` in RStudio, or start R with the package root as the working directory. renv activates automatically; use renv to restore the R packages listed in renv.lock. File paths are built with the here package, so no directory needs to be changed.\n2. Run `02_programs\/00_main.R`. It renders `02_programs\/HCIplus_WorkingPaper.qmd`, which computes every table, figure, and number quoted in the text, and writes the manuscript to `03_output\/HCIplus_WorkingPaper.docx`, the figures (PNG and CSV) to `03_output\/figures\/`, and the table data (CSV) to `03_output\/tables\/`.\n\nAll input data are included in `01_raw_data\/`. Setting `pull_fresh_data` to TRUE at the top of `00_main.R` re-downloads the World Development Indicators and country metadata through the World Bank API; because WDI series are revised over time, a fresh download may move some results slightly away from the published values."},"datacite":{"creators":[{"givenName":"Brian William","familyName":"Stacy","nameType":"Personal","affiliation":[{"name":"World Bank Group","affiliationIdentifier":"https:\/\/ror.org\/02md09461","affiliationIdentifierScheme":"ROR","schemeUri":"https:\/\/ror.org"}]},{"givenName":"Norbert","familyName":"Schady","nameType":"Personal","affiliation":[{"name":"World Bank Group","affiliationIdentifier":"https:\/\/ror.org\/02md09461","affiliationIdentifierScheme":"ROR","schemeUri":"https:\/\/ror.org"}]},{"givenName":"Joana","familyName":"Silva","nameType":"Personal","affiliation":[{"name":"World Bank Group","affiliationIdentifier":"https:\/\/ror.org\/02md09461","affiliationIdentifierScheme":"ROR","schemeUri":"https:\/\/ror.org"}]},{"givenName":"Benoit","familyName":"Decerf","nameType":"Personal","affiliation":[{"name":"University of Namur","affiliationIdentifier":"https:\/\/ror.org\/03d1maw17","affiliationIdentifierScheme":"ROR","schemeUri":"https:\/\/ror.org"}]},{"givenName":"Ritika","familyName":"D\u2019Souza","nameType":"Personal","affiliation":[{"name":"World Bank Group","affiliationIdentifier":"https:\/\/ror.org\/02md09461","affiliationIdentifierScheme":"ROR","schemeUri":"https:\/\/ror.org"}]}],"titles":[{"lang":"en","title":"Reproducibility package for Measuring Human Capital Over the Life Cycle: The World Bank Human Capital Index Plus"},{"title":"RR_WLD_2026_806","titleType":"Other"}],"publisher":"World Bank","publicationYear":"2026","types":{"resourceType":"Reproducibility package","resourceTypeGeneral":"Other"},"url":"https:\/\/reproducibility.worldbank.org\/index.php\/catalog\/study\/RR_WLD_2026_806","language":"en"},"tags":[{"tag":"DOI"},{"tag":"Open Code"},{"tag":"Open Data"}],"schematype":"script"}