We provide an asymptotic distribution theory for a class of Generalized Method of Moments estimators that arise in the study of differentiated product markets when the number of observations is associated with the number of products within a given market. We allow for three sources of error: the...

This paper considers three aspects of the job insecurity facing British men in the last two decades. The probability of becoming unemployed, the costs of unemployment in terms of real wages losses and the probability that the continuously employed will experience substantial real wage losses....

This paper describes a method for estimating panels by imposing a factor structure on the residuals. The method allows SUR estimation of panel models by providing a full-rank estimator of the system covariance matrix when the usual estimate is rank-deficient. We charactersie completely the...

During the summer of 2000, the government will introduce a new system of pay and performance management for teachers. The Centre for Economic Performance is conducting a ‘before-andafter’ panel study of teachers and schools to ascertain its effects on motivation and performance. This paper...

Using convex calculus, we extend the Wong-Viner Theorem to nondifferentiable costs by equating the capital inputs' rental prices to their profit-imputed marginal values. Thus extended, the short-run approach to LRMC pricing is applied to peak-load pricing with storage.

This paper is concerned with the relationship between wages and unemployment. Using UK regions and individuals as the basis for our analysis, the following questions are investigated. First, is the wage equation a relationship between unemployment and wages or wage changes? Second, can we...

This paper analyses the empirical determinants of contract length, a key and yet neglected dimension of contractual structure. I use data on tenancy agreements signed between 1870 and 1880 in the district of Siracusa, Italy to estimate the choice over length and compensation schemes jointly. The...

Some recent empirical findings suggest that there are intrinsic links between the statistical regularities regarding cohort survival patterns, the persistence of firm turnover, and shakeout during an industry life-cycle. This paper presents a theoretical model which explains these regularities...

A simple model of process innovation is proposed, where firms learn about their ideal production process by making prototypes. We build around this a dynamic general equilibrium model, and derive conditions under which diversified and specialised cities coexist. New products are developed in...