Dynamic Comparative Advantage in International Shipbuilding: The Transition from Wood to Steel
Bibliographic record
Abstract
Can temporary initial input cost advantages have a long-run impact on the spatial distribution of production and trade? I study this question in the context of the international shipbuilding industry during the transition from wood to metal ship production (1850-1912). Input price advantages gave Britain an early lead in metal shipbuilding, while the U.S. and Canada specialized in wood ship production. However, after 1890, Britain's initial price advantages disappeared. By comparing production patterns on the Atlantic Coast of North America, which faced British competition, to the Great Lakes, which were isolated from competition, I show that British competition substantially reduced the ability of North American producers to transition to metal ship production. I also exploit additional sources of variation to show how government protection and support moderated these effects for some Atlantic Coast producers, allowing them to survive the demise of wood shipbuilding. Finally, I provide evidence that the mechanism driving the persistence of Britain's lead was the development of large pools of skilled craft workers. These results shed light on the role of past conditions in influencing current production and trade patterns and with implications for the use of industrial policy and tariff protection.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.002 |
| 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".