Trends in characteristics of births by State: United States, 1990, 1995, and 2000-2002.
Bibliographic record
Abstract
OBJECTIVE: This report presents U.S. and State-level data on births, birth rates, fertility rates, sex ratio, marital status, and educational attainment by race and Hispanic origin for 1990, 1995, and 2000-2002. METHODS: Data are presented in detailed tables, summary tables, maps, and graphs. RESULTS: In 2002 there were 4,021,726 live births in the United States, 136,486 fewer than in 1990. Despite a slight decline in the number of births nationwide, a few States witnessed significant increases in the number of live births with most of these States located in the western United States. Some of the westward shift in number of births is attributable to a growing population and some to the age and race composition of the individual States. However, real differences in fertility by State persist even when the effects of age structure and race and ethnic composition of the States' population are taken into account. This report also presents data on sex ratios, percentage unmarried, and educational attainment of mothers. Several observations from these data are noteworthy. The proportion of births to unmarried mothers increased nationally and in every State between 1990 and 2002. Nationally the percentage of mothers with fewer than 12 years of education fell, and the percentage with 16 or more years increased for all racial and ethnic groups. However, at the State level, the percentage of women with fewer than 12 years of education increased for nearly a quarter of the States, despite near universal increases in the percentage of women with 16 or more years of education.
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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 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.005 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".