Critical behaviour of complex systems

Abstract
An overview of recent results of the critical behaviour of micellar systems is given. It is found that it is possible to define a master curve for the effective critical exponent eff for systems that show a monotonic crossover. It is also shown that the critical behaviour of the osmotic susceptibility of a metastable critical system is the same as that of stable systems. Finally the two-exponential decay of the fluctuations of the order parameter is discussed.