Bibliographic record
Abstract
The period from 2010 to 2030 will see as sweeping a change to America’s metropolitan landscape as the half century after World War II. During the baby boom era, 1946 through 1964, about half of American households were raising children; in 2030, only about a quarter will be. Between 2010 and 2030, the increase in the number of single-person households will be more than double the increase in the number of households with children. A major reason is the aging of the boomers: in 2010, 13 percent of the population will be age sixty-five or over; but by 2030, 19 percent of the population will be. There will be changes in the kind of housing and neighborhoods that households prefer. More than half of all households will prefer housing in neighborhoods that comprise such “urbanity” attributes as transit accessibility; proximity to shopping and restaurants; mixed uses including mixed housing choices; and mixed incomes, ages, and ethnicities. Moving toward this new urbanity will require reconsideration of several policies with roots dating from the baby boom era.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.002 |
| Science and technology studies | 0.006 | 0.004 |
| Scholarly communication | 0.009 | 0.009 |
| Open science | 0.001 | 0.006 |
| Research integrity | 0.002 | 0.005 |
| Insufficient payload (model declined to judge) | 0.016 | 0.002 |
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".