In a mean-variance model, both the means and variances are allowed to vary
across regions.
Thus, this model fits a separate \(\mu_j\) and \(\sigma_j\) for each
region \(j\).
See Also
changepoint::cpt.meanvar()
Other model-fitting:
fit_arima(),
fit_lmshift(),
fit_meanshift(),
fit_nhpp(),
model_args(),
model_name(),
new_fun_cpt(),
whomademe()