We report an empirical analysis of the responses of the supply and demand for secondary care to waiting list size and waiting times. Whereas previous empirical analyses have used data aggregated to area level, our analysis focuses on the supply responses of a single hospital and the demand...

The generalized method of moments (GMM) estimation technique is discussed for count data models with endogenous regressors. Count data models can be specified with additive or multiplicative errors and it is shown that, in general, a set of instruments is not orthogonal to both error types....

Moment conditions are derived for dynamic linear panel data models with linear individual specific effects in the mean and multiplicative individual effects in the conditional ARCH type variance function. The relation and correlation between the linear and multiplicative effects are...

This paper presents a life cycle model for the demand for health, and derives empirical specifications that distinguish between permanent and transitory wage responses. Using panel data, we estimate dynamic health and health input demand equations. We find evidence of negative transitory wage...

For small group sizes, the Generalised Least Squares (CLS) estimator in multilevel models is biased and inconsistent when the random cluster effects are correlated with the regressors. A fixed effects approach, conditioning on the cluster effects, provides consistent estimates for the slope...

The benefits of panel data are well-documented but missing data problems are often more severe. In particular, units that respond in the first wave may drop out of the panel after one or more periods of participation. This paper focuses on identification and Maximum Likelihood estimation of...

Part-time work whilst still in full-time education is common in many industrialized countries, and teenagers constitute a significant component of the work force in some sectors of the labour market. In Britain, in the early 1990's, some 60 percent of 16-18 year olds still in full time education...

This paper presents an hedonic model of the price of a sample of new cars available in the UK during the period 1986 to 1995. It overcomes the problem of collinearity in the characteristics data by grouping them on a priori grounds and then using principal components analysis to generate group...

Economists have frequently argued that cash transfers are to be preferred to in-kind transfers. However, the argument is strictly true only where there are no market failures, and there are several arguments in favour of in-kind transfers that are valid in these circumstances In-kind transfers...