The Estimation of Models of Labour Market Behaviour
探讨了三种劳动力抽样方式（按状态、按流动、按总体）如何影响个体可观测与不可观测特征的联合分布，以及这对估计劳动力市场行为模型的含义。
In this paper we view the labour market experience of individuals as a process of movement between the states of employment and unemployment. We note that there are three main ways of sampling members of the labour force namely sampling the members of a specific state, sampling the people entering or leaving a state and sampling the population regardless of state. The joint distribution of observable and unobservable characteristics of individuals depends on the mode of sampling adopted. We examine this dependence and its implications for the interpretation of estimates of models of labour market behaviour.