Closing the 49th Parallel: An Unexplored Episode in Canadian Economic and Political History
Bibliographic record
Abstract
We draw attention to, and begin to consider the implications of the severe restrictions on emigration by Canadians to the United States introduced under the U.S. Immigration Act of 1965. These restrictions came into effect in 1968 and lasted until mobility began to increase under the free trade agreements in the early 1990's. This is an unusual episode in Canadian history, one whose implications for public policy have received little attention. The near closing of the border during this period likely led to a decrease in the elasticity of labour supply in Canada. We derive the implications of such a change in a competitive political model where the political costs and benefits of levying taxes on different activities are distinguished. Increased reliance on, and changes in the structure of, labour income taxes, and an increase in the size of the public sector are predicted. We show that these predictions are consistent with what occurred over the two decades after the near closing of the U.S. border.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 teacher head, 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".