Excess Worker Reallocation
研究工人在不同职业和行业间流动时面临的宏观与个人激励权衡，发现劳动力市场紧张时比较优势主导等待成本，减少过度再配置并提高匹配成功率。
Workers face a trade-off between macroeconomic and individual incentives to work in different occupations/industries; namely, between search frictions and personal comparative advantages. Workers endowed with heterogeneous multi-dimensional skills search for jobs that require different skill combinations. In equilibrium, specialized individuals contact few, selected types of vacancies, where they are likely to be hired; those with weak comparative advantages are seldom chosen among competing applicants, thus seek any job type. In a tight labour market, comparative advantages dominate waiting costs: offsetting labour mobility across industries/occupations—Excess Worker Reallocation—is lower and matches are more successful, consistently with direct and indirect evidence.