This paper studies the prevalence and nature of zero-hours contracts (ZHCs) in the UK labour market. The headline count of ZHC workers based on the Labour Force Survey has long underestimated and continues to underestimate the number of workers in ZHC or ZHC-like jobs. ZHC jobs and workers are heterogeneous, but ZHC jobs have become increasingly concentrated among young workers, full-time students, migrants, black and minority ethnic workers, in personal service and elementary occupations, and in the distribution, accommodation and restaurant sector over time. Compared to other forms of employment, median wages in ZHC jobs have also fallen over time. The most common prior labour market state for ZHC workers is non-ZHC employment, particularly part-time employment, and we cannot reject that part of the reported growth in ZHCs has been driven by reclassification of existing employment relationships. Similarly, we cannot reject that growth in public awareness of ZHCs contributed substantially to recent growth in reported ZHCs, particularly over the period 2013/14.

中文翻译：

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零工时合同及其增长

本文研究了英国劳动力市场中零工时合同 (ZHC) 的普遍性和性质。基于劳动力调查的 ZHC 工人总人数长期以来一直低估并将继续低估 ZHC 或类似 ZHC 工作的工人数量。ZHC 的工作和工人是异质的，但随着时间的推移，ZHC 的工作越来越集中在青年工人、全日制学生、移民、黑人和少数民族工人、个人服务和初级职业以及分销、住宿和餐饮部门。与其他形式的就业相比，ZHC 工作的工资中位数也随着时间的推移而下降。ZHC 工人最常见的先前劳动力市场状态是非 ZHC 就业，尤其是兼职就业，我们不能否认所报告的 ZHC 增长的一部分是由现有雇佣关系的重新分类驱动的。同样，我们不能否认公众对 ZHC 的认识的增长对最近报告的 ZHC 的增长做出了重大贡献，尤其是在 2013/14 年期间。