roughly-price-guesses-2026-09.csv - own data from roughly.is players, not a representative sample. License: CC BY 4.0 (credit: roughly.is).
Source: every guess from the daily "How expensive?" game (roughly.is), one row per guess, 7 Sep 2026 to 26 Sep 2026 14:00 UTC. Filter: game=howexpensive, mode=daily. 4,226 rows, 89 items.
Columns: date (UTC day) · item (game item id) · era (historical = item id carries a year 19xx/20xx, today = current price, unknown = item id not recorded) · lang (game language) · result (factor and direction as the game shows it; German results translated to "too high"/"too low"/"Spot on") · true_price, currency, when, place, q (the item as stored in the game; GBp = pence, decimal pence also before 1971).
Real prices: BFS (Swiss FSO), US BLS, UK ONS (OGL v3), Statistik Austria, Eurostat. No device ids, no times finer than the day.
Published counts (post) = rows with lang=en; the 66 English rows with era=unknown were counted under "today". Today: 1,154 too high / 1,193 too low / 113 spot on. Historical: 1,022 / 360 / 21.
Study: https://roughly.is/blog/people-guess-old-prices-too-high.html