... Cristobal M, Gianola D, Im S (1992) Marginal likelihood and Bayesian approaches to the analysis of heterogeneous residual variances in mixed linear Gaussian models Comput Stat Data Anal 13, 291-305 ... Abstract to the EAAP, Lillehammer, Norway, 25-29 August Gilmour A, Anderson RD, Rae A (1987) Variance components on an underlying scale for ordered multiple threshold categorical data using a ... INTRODUCTION An appealing model for the analysis of ordered categorical data is the so-called threshold model Although introduced in population and quantitative genetics by Wright (193 4a, b) and discussed...