The role of Mexico in the first oil shortage: 1918-1922, an international perspective
Bibliographic record
Abstract
In 1921 Mexico produced a quarter of world’s petroleum, making the country the second largest producer in the world, but by 1930 it only accounted for 3 per cent of world’s production. To date the discussion has mostly relied on events taking place in Mexico for explaining the decline of the industry. Very little attention has been placed to developments in petroleum industry elsewhere, except Venezuela. Practically no attention has been paid to the reasons for the rise of oil output in Mexico. This neglects the massive changes taking place in the petroleum industry worldwide during the Great War years and its aftermath, and overall ignores the shortage of oil that occurred in the world’s markets between 1918-1921. These are crucial events in order to understand the early rise of the Mexican oil industry and set the basis for a better understanding of the subsequent sudden decline.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.005 | 0.004 |
| Scholarly communication | 0.005 | 0.004 |
| Open science | 0.000 | 0.002 |
| Research integrity | 0.002 | 0.003 |
| Insufficient payload (model declined to judge) | 0.005 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".