The Demographic Foundations of Rising Employment and Earnings Among Single Mothers in Canada and the United States, 1980 to 2000
Bibliographic record
Abstract
Despite comparatively modest welfare reforms in Canada relative to those of the United States, employment rates and earnings among single mothers have risen by virtually identical magnitudes in the two countries since 1980. We show that most of the gains in Canada and a substantial share of the change in the United States were the result of the dynamics of cohort replacement and population aging as the large and better educated baby boom generation replaced earlier cohorts and began entering their forties. In both countries, demographic effects were the main factor accounting for higher employment and earnings among older (40 and over) single mothers. Changes among younger single mothers, in contrast, were mainly the result of changes in labour market behaviour and other unmeasured variables. Overall, demographic changes dominated in Canada but not in the United States for two reasons: (a) Canadian single mothers are significantly older than their U.S. counterparts; and, (b) consistent with the welfare reform thesis, the magnitude of behavioural change among younger single mothers was much larger in the United States.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".