High prices and insufficient quality of care are observed in nursing homes in France. Reforms are currently under discussion, but governments are facing a dilemma : any measure of price cut is likely to affect quality and any improvement in quality would probably be inflationary. This work...

Efficiency of financial markets is one of the most studied subjects in theoretical finance. Formalization of this idea is realised by the random walk model. Numerous tests have been developed to validate the hypothesis of identically and independently distributed innovations. But the results of...