Search and matching models imply that firms' employment adjustment costs depend on the tightness of the labor market, giving rise to endogenous or nonlinear dynamics in employment. This paper sets this argument out in detail, estimating a model simultaneously explaining the long-run level of...

In this paper we describe how restricted vector autoregressions can be employed to examine the sources of macroeconomic fluctuations. We show how cointegration restrictions can be used to identify a VAR system with common stochastic trends subject to transitory and permanent changes in average...

In this paper the authors offer a method for deciding how to aggregate a set of elementary industries. The method is then applied to the problem of estimating a wage equation that allows for industry-specific effects. Their method explicitly formalizes the trade-off between goodness-of-fit and...

Automobile insurance is an example of a market where multi-period contracts are observed. This form of contract can be justified by asymmetrical information between the insurer and the insured. Insurers use risk classification together with bonus-malus systems. In this paper the authors show...

The author shows that the maximum power of a generic unit root test against any stationary alternative is equal to the true level of the test. He then uses Monte Carlo methods to investigate the implications for several such tests. He shows patterns of rejection probabilities over a variety of...

A theory of testing under non-standard conditions is developed. By viewing the likelihood as a function of the unknown parameters, empirical process theory enables us to bound the asymptotic distribution of standardized likelihood ratio statistics, even when conventional regularity conditions...

Data on expectations collected by business surveys offer the opportunity to test the rational expectation hypothesis. Tests directly based on qualitative data are not powerful because of the nature of the data. An alternative method is proposed in this paper. The author applies the usual...