The impact of the Plant Breeders' Rights Act on wheat productivity : evidence from western Canada
Bibliographic record
Abstract
Plant Breeders' Rights (PBR) are a form of intellectual property rights enabling breeders of new plant varieties to have the exclusive right to produce and sell propagating material of their new plant varieties. The existence of effective property rights has been pointed to as a stimulus of increased R&D and productivity. Canada has had legislation to provide PBR protection for about two decades, and is considering further strengthening of the regulatory framework. However, there are few studies that have examined the effectiveness of the legislation on crop productivity. This thesis investigates the hypothesis that the adoption of wheat varieties qualifying for Plant Breeders' Rights has increased overall wheat yields and rate of yield increase. The yield response function models are applied to industry data for western Canada and Alberta, respectively. The empirical results show that the PBR Act had a relatively small impact on wheat yields. Among wheat classes, it had a positive impact for Durum wheat in Alberta.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".