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We examine the relationships among on-the-job training, starting wages, wage growth, and productivity growth. Our models suggest that training lowers starting wages, but the estimated magnitudes are small. When firms are asked directly, we find that they pay higher starting wages to workers requiring less training than is typical, but do not pay lower starting wages to workers who require more training than is typical. In contrast to the results for wage growth, we find a large, robust impact of training on productivity growth, suggesting that firms pay most of the cost and reap most of the returns to training.