Get four conclusions from model analysis, including: if the stronger the representative consumers' preference to the human capital is, the greater the efforts of two periods are;

模型剖析得到了四个结论，分离是：如果代表性消耗者对人力资本的偏好越强，则两期的绝力越大；

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H1-B visas for skilled workers might serve as a model: they can run for two three-year periods, giving both workers and employers time to decide whether they would prefer a permanent arrangement.

ECONOMIST: Managing the market