| column,type,description |
| period,date,Start of the period: Monday of the week (UTC) or first day of the month |
| site,text,"Stack Exchange site, e.g. stackoverflow.com (site panels)" |
| site_group,text,"treated (Stack Overflow), so_language, tech_exposed, donor (non-programming comparison sites) or context (Meta Stack Overflow) (site panels)" |
| tag,text,"Stack Overflow tag, as it was when the question was asked (tag panels)" |
| tag_group,text,"top300 (largest tags of 2019-21) or new_post2021 (first used after 2021-09-30, >= 200 questions) (tag panels)" |
| tag_kind,text,"top300: hand-assigned family (language, framework, data_ml, ...); new_post2021: new / version / feature (tag panels)" |
| questions,count,New questions created in the period (questions deleted before the dump are not included) |
| active_askers,count,Distinct users who asked at least one question in the period |
| answered_ever,count,Questions with at least one answer by the dump date |
| eligible_24h,count,Questions whose 24-hour window ends before the 2026-09-30 cut-off (denominator for answered_24h) |
| answered_24h,count,Questions answered within 24 hours (among eligible_24h) |
| eligible_7d,count,Questions whose 7-day window ends before the cut-off |
| answered_7d,count,Questions answered within 7 days (among eligible_7d) |
| eligible_30d,count,Questions whose 30-day window ends before the cut-off |
| accepted_30d,count,Questions with an answer accepted within 30 days (among eligible_30d) |
| closed,count,Questions ever closed (by the dump date) |
| closed_duplicate,count,Questions closed as duplicates (by the dump date) |
| with_code,count,Questions with at least one code block |
| median_hours_to_first_answer,hours,"Median hours to the first answer, among questions answered (by the dump date); recent periods are biased low" |
| answers,count,New answers created in the period (site panels) |
| active_answerers,count,Distinct users who posted at least one answer in the period (site panels) |
| new_posters,count,Users whose first question or answer on the site is in the period (site panels) |
| questions_incl_deleted,count,"Questions including later-deleted ones, from the Stack Exchange Data Explorer (SEDE), 2019-01 onward; empty where not available (site_month only)" |
| partial_period,flag,The period is not fully inside the dump (first partial week/month or after the cut-off) |
| final_8_weeks,flag,The period starts in the last 8 weeks before the cut-off: answers and closures may still be arriving |
| tag,,(tag_estimates) Stack Overflow tag |
| family,,(tag_estimates) Hand-assigned tag family |
| size_2019_2021,,(tag_estimates) Questions in 2019-2021 (tags at time of asking) |
| age_years_at_break,,(tag_estimates) Years from the tag's first question to 2022-11-30 |
| pct,,"(tag_estimates) Average monthly gap vs the tag's own extended 2017-22 trend, Dec 2022 - Sep 2026, % (hierarchical negative binomial, posterior mean)" |
| pct_low,,"(tag_estimates) 95% credible interval, lower (%)" |
| pct_high,,"(tag_estimates) 95% credible interval, upper (%)" |
| questions_2021,,(tag_estimates) Questions in 2021 |
| questions_2025,,(tag_estimates) Questions in 2025 |
| plain_change_2021_2025_pct,,"(tag_estimates) Plain change in questions, 2021 to 2025, % (no trend assumed)" |
| |
