Hierarchical Social Recommendation Model Based on a Graph Neural Network

Table 1

Statistics for the two datasets.

Dataset	Users	Items	Ratings	Links	Rating density	Social connection density
Ciao	7,317	10,4975	283,319	111,781	0.0368%	0.2087%
Epinions	18,088	261,649	764,352	355,813	0.0161%	0.1087%