riance structure of the social relations model
    (Warner, Kenny and Stoto (1979) &lt;DOI:10.1037/0022-3514.37.10.1742&gt;, 
    Wong (1982) &lt;DOI:10.2307/2287296&gt;), and multiplicative factor
    models (Hoff(2009) &lt;DOI:10.1007/s10588-008-9040-4&gt;). 
    Several different link functions accommodate different
    relational data structures, including binary/network data, normal
    relational data, zero-inflated positive outcomes using a tobit model, ordinal relational data and data from
    fixed