Mobility statistics are direct measures of the intensity of competition; market structure indicators indirect measures. In this regard the most widely employed measure of market structure is the concentration ratio. Despite the fact that structural measures provide only proxies for the extent of...

This paper examines a neoclassical stochastic endogenous growth model in which terms-of-trade uncertainty affects savings and consumption growth. The model explains the positive link between growth and the average rate of change of terms of trade found in recent empirical studies. In addition,...

Since the seminal work of Mandelbrot (1963), alpha-stable distributions with infinite variance have been regarded as a more realistic distributional assumption than the normal distribution for some economic variables, especially financial data. After providing a brief survey of theoretical...

In 1994 Milk Marketing Boards in the UK were disbanded, their role as milk purchasers was taken by more than 100 licensed organisations. It is shown that this change resulted in an increase in the variation between producers' milk price. The majority of dairy farmers sold milk through the Milk...

Some recent time-series applications use probit models to measure the forecasting power of a set of variables. Correct inferences about the significance of the variables requires a consistent estimator of the covariance matrix of the estimated model coefficients. A potential source of...

In the specification of linear regression models it is common to indicate a list of candidate variables from which a subset enters the model with nonzero coefficients. This paper interprets this specification as a mixed continuous-discrete prior distribution for coefficient values. It then...