Members of Ecolog-L may be interested in the following paper: Using information criteria to select the correct variance-covariance structure for longitudinal data. (2010). By Adrian G. Barnett, Nicola Koper, Annette J. Dobson, Fiona Schmiegelow, Micheline Manseau. Methods in Ecology and Evolution.
http://www3.interscience.wiley.com/journal/123243869/abstract Kind regards, Graziella Iossa
