To measure healthcare accessibility, a previous study formulated a stochastic cost frontier model, and applied it to distances of communal centres from nearest emergency hospitals in Chile. Based on a larger set of variables, this study re-estimates the distance threshold, and tests alternative...

The strength of the adjustment towards arbitrage equilibrium can be expected to be somehow proportional to the extent of market price deviations from equilibrium. In this article, threshold and smooth transition cointegration models are applied to quarterly wheat prices of three major world...

Long-term growth convergence has extensively been investigated based on economic variables. Indicators of social development and health status are generally focused on their contribution to growth or on assessing national health care systems. Yet, as a general yardstick of well-being, life...

Mineral commodity prices and, to a lesser extent, supply have typically experienced substantial fluctuations as well as sudden, largely unanticipated, breaks. Instability has severe consequences in term of returns on mining investment and the balance of payments of the countries concerned....

Many empirically observed time series, even when behaving as stationary processes (eventually after differencing), exhibit characteristics of extremely high persistence. Unit root tests and autocorrelation functions do not always provide unequivocal indications regarding long-run dynamic...