A list with the following components:
n_steps number of iterations in the stepwise analysis
lnls matrix of traits-by-iterations, giving the log-likelihood for each trait at each iteration of the analysis
n_regimes_seq matrix of the summaries of regime structure at each iteration of the model
aics vector giving the AICc value at each step
shifts shifts present in the final fitted Hansen model
n_regimes summary of regime structure of the final fitted Hansen model (see note below)
alpha estimate of alpha for each trait in the final model
sigma_squared estimate of sigma_squared for each trait in the final model
theta matrix of estimated optima (one per regime per trait) in the final model