The creation of electricity markets has raised the fundamental question as to whether markets provide the right incentives for the provision of the reserves needed to maintain system reliability, or whether some form of regulation is needed. In some states in the US, electricity retailers have...

This paper investigates the effect of capacity constraints on the sustainability of collusion in markets subject to cyclical demand fluctuations. In the absence of capacity constraints (i.e. a limiting case of our model), Haltiwanger and Harrington (1991) show that firms find it more difficult...

The hypothesis that the behavior of firms in adjusting the number of their employees along a business cycle depends on the size of the firms has often been mentioned in the literature. Several authors argue that small and medium sized enterprises are more hesitant in hiring additional employees...

The paper discusses several questions related to the economic cycles, from the scientific methodological approach to isolate the economic cycles, to an empirical application using data of the Portuguese industrial sector, passing by the identification of the real economic cycles that modulated...