ddorn.net 的前十大競爭對手

scholar.google.com

google scholar provides a simple way to broadly search for scholarly literature. search across a wide variety of disciplines and sources: articles, theses, books, abstracts and court opinions.

thetuvaproject.com

| Data Source | Type | Format | GitHub |

github.com

Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.

ubscenter.uzh.ch

UBSCenter

cps.ipums.org

ipums cps harmonizes microdata from the monthly u.s. labor force survey, the current population survey (cps), covering the period 1962 to the present. data include demographic information, rich employment data, program participation and supplemental data on topics such as fertility, tobacco use, volunteer activities, voter registration, computer and internet use, food security, and more. the data may be linked together across time to create a short panel for longitudinal analysis.