Understanding the Increased Time to the Baccalaureate Degree
Bibliographic record
Abstract
Time until completion of a baccalaureate degree has increased markedly over the last three decades. Between 1972 and 1992, average time to degree increased by more than one-quarter of a year, the completion rate among college attendees dropped from 51.1% to 45.3% and, among those receiving degrees, the percent receiving a degree within 4 years dropped from 56.8% to 43.6%. We assess the extent to which these shifts result from changes in the preparation of college students over time, reductions in collegiate resources, erosion in family circumstances, or other broad macro-economic adjustments. We produce evidence that increased stratification in U.S. higher education and reductions in collegiate resources outside the top-tier of institutions are a primary component of the explanation for the observed increases in time to degree. The shift toward initial enrollment at two-year institutions rather than four-year institutions accounts for some of the decline in completion rates. In addition, we find evidence of increased hours of employment among students, which is consistent with students working more to meet rising college costs.
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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 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.012 | 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".