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API Access
Access dataset files directly from scripts, code, or AI agents.
Each file has a stable URL (r-link) that you can use directly in scripts, apps, or AI agents. These URLs are permanent and safe to hardcode.
Start with these files — they give you everything you need to understand and access the dataset.
- 1. Fetch datapackage.json to inspect schema and resources
- 2. Download data resources listed in datapackage.json
- 3. Read README.md for full context
Data Files
Explore with AIhistorical-adoption-of-technology
| Field | Type |
|---|---|
| country_name | string |
| year | date |
| ag_harvester | number |
| ag_milkingmachine | number |
| ag_tractor | number |
| atm | number |
| aviationpkm | number |
| aviationtkm | number |
| bed_acute | number |
| bed_hosp | number |
| bed_longterm | number |
| cabletv | number |
| cellphone | number |
| cheque | number |
| computer | number |
| creditdebit | number |
| eft | number |
| elecprod | number |
| fert_total | number |
| internetuser | number |
| irrigatedarea | number |
| kidney_dialpat | number |
| kidney_homedialpat | number |
| loom_auto | number |
| loom_total | number |
| number | |
| med_catscanner | number |
| med_lithotriptor | number |
| med_mammograph | number |
| med_mriunit | number |
| med_radiationequip | number |
| newspaper | number |
| pctdaysurg_cataract | number |
| pctdaysurg_cholecyst | number |
| pctdaysurg_hernia | number |
| pctdaysurg_lapcholecyst | number |
| pctdaysurg_tonsil | number |
| pctdaysurg_varicosevein | number |
| pcthomedialysis | number |
| pctimmunizdpt | number |
| pctimmunizmeas | number |
| pctirrigated | number |
| pctmvbyarea | number |
| pest_total | number |
| pos | number |
| radio | number |
| railline | number |
| railp | number |
| railpkm | number |
| railt | number |
| railtkm | number |
| ship_all | number |
| ship_motor | number |
| ship_sail | number |
| ship_steam | number |
| ship_steammotor | number |
| shipton_all | number |
| shipton_motor | number |
| shipton_sail | number |
| shipton_steam | number |
| shipton_steammotor | number |
| spindle_mule | number |
| spindle_ring | number |
| steel_acidbess | number |
| steel_basicbess | number |
| steel_bof | number |
| steel_eaf | number |
| steel_ohf | number |
| steel_other | number |
| steel_stainless | number |
| surg_appendectomy | number |
| surg_breastcnsv | number |
| surg_cardcath | number |
| surg_cataract | number |
| surg_cholecyst | number |
| surg_corbypass | number |
| surg_corinterven | number |
| surg_corstent | number |
| surg_csection | number |
| surg_hernia | number |
| surg_hipreplace | number |
| surg_hysterectomy | number |
| surg_kneereplace | number |
| surg_lapcholecyst | number |
| surg_mastectomy | number |
| surg_pacemaker | number |
| surg_prostatetrans | number |
| surg_prostatextrans | number |
| surg_tonsil | number |
| surg_varicosevein | number |
| telegram | number |
| telephone | number |
| transplant_bonemarrow | number |
| transplant_heart | number |
| transplant_kidney | number |
| transplant_liver | number |
| transplant_lung | number |
| tv | number |
| txtlmat_artif | number |
| txtlmat_otherraw | number |
| txtlmat_synth | number |
| txtlmat_totalraw | number |
| vehicle_car | number |
| vehicle_com | number |
| visitorbeds | number |
| visitorrooms | number |
| xlpopulation | number |
| xlrealgdp | number |
| pctivprimeenroll | number |
| pctivsecenroll | number |
| pctivprivateinv | number |
| pctivpublicinv | number |
| pctivliteracy | number |
Download
Download CSVAbout
- Last updated
- 9 February 2026
- Total rows
- ...
- Format
- CSV
- File size
- 6.37 MB
- Source
About this dataset
Data
This note accompanies the Cross-country Historical Adoption of Technology (CHAT) dataset. CHAT is an unbalanced panel dataset with information on the adoption of over 100 technologies in more than 150 countries since 1800. The data is available for download at: http://www.nber.org/data/chat.
We discuss the main aim of CHAT, its scope and limitations, as well as several ways in which we have used the data so far and ways to potentially use the data for other research. http://www.nber.org/papers/w15319