About: http://webisa.webdatacommons.org/366072261

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	As you said MODEL INDIRECT and MODEL CONSTRAINT get the same results when a product is an appropriate expression of an indirect effect.
http://www.w3.org/ns/prov#wasQuotedFrom	statmodel.com