Validation and sensitivity
Volume regression
Selected publication sample; no causal interpretation
2rows
13fields
0country / area identifiers
CSVcomplete download
What one row represents
monthly descriptive regression
Key: date_start
Units: Elasticity, rank correlation, R squared and HC3 SE
Preview
First 2 rows. The download contains all 2 rows.
| date_start | n_country_rows | n_log_positive | excluded_zero_or_missing_usage_share | spearman | intercept | slope | slope_hc3_se | slope_hc3_normal_low | slope_hc3_normal_high | r_squared | model | inference |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-04-01 | 114 | 114 | 0 | 0.9922657758132934 | 5.467511504824861 | 1.12144799326881 | 0.05139337155180216 | 1.0207169850272777 | 1.2221790015103422 | 0.9371404609918104 | ln(positive published task cells) = intercept + slope * ln(global usage share in percentage points) | Descriptive selected-country association; HC3 normal approximation is not causal identification |
| 2026-05-01 | 121 | 121 | 0 | 0.9959729034009852 | 5.722176865958129 | 1.0344390901454863 | 0.04652086456776883 | 0.9432581955926594 | 1.1256199846983133 | 0.9349938878395784 | ln(positive published task cells) = intercept + slope * ln(global usage share in percentage points) | Descriptive selected-country association; HC3 normal approximation is not causal identification |
Field dictionary
| Field | Unit | Definition | Missingness |
|---|---|---|---|
| date_start | date | Source observation-window start, not retrieval date | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| n_country_rows | see method/source | Field retained in table schema; see docs/method_country.md, docs/country_statistics.md or docs/piaac_validation.md for its source-specific definition | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| n_log_positive | count | Countries with positive nonmissing volume and positive task counts included in log regression | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| excluded_zero_or_missing_usage_share | see method/source | Field retained in table schema; see docs/method_country.md, docs/country_statistics.md or docs/piaac_validation.md for its source-specific definition | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| spearman | correlation | Pearson correlation of average ranks on the stated common sample | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| intercept | see method/source | Field retained in table schema; see docs/method_country.md, docs/country_statistics.md or docs/piaac_validation.md for its source-specific definition | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| slope | elasticity | OLS slope of log positive task-cell count on log global usage share | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| slope_hc3_se | standard error | HC3 heteroskedasticity-robust slope standard error; descriptive selected-country sample | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| slope_hc3_normal_low | see method/source | Field retained in table schema; see docs/method_country.md, docs/country_statistics.md or docs/piaac_validation.md for its source-specific definition | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| slope_hc3_normal_high | see method/source | Field retained in table schema; see docs/method_country.md, docs/country_statistics.md or docs/piaac_validation.md for its source-specific definition | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| r_squared | fraction | Explained variation in log task-cell count from the descriptive OLS fit | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| model | model identifier | Frozen local inference model tag; the accompanying digest identifies the tested model configuration | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
| inference | see method/source | Field retained in table schema; see docs/method_country.md, docs/country_statistics.md or docs/piaac_validation.md for its source-specific definition | Blank/NA means unavailable or not applicable unless an explicit status field states otherwise; numeric zero retains its stated publication/source meaning |
Provenance and reuse
Frozen source table: outputs/evidence/volume_regression.csv
Download SHA-256: 8987ad5b31c77b260f9314ce4f6b8ff53086e135a0ae8e9f7e8c25ff021e1828
Component-specific source terms apply. Read the attribution and reuse terms. Missing values retain the source meaning; a zero does not override an explicit publication status.
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