A Survey of Long-Tail Item Recommendation Methods

Table 2

PMI score of four methods on two datasets [24].

Datasets		MaxEnt-LDA	DLDA	FSenExt	MaxEnt-BTM
Mobile electronics	5	1.15	1.2	1.7	1.84
	10	0.67	0.79	1.09	1.28
	20	0.44	0.4	0.68	0.83
Seattle	5	1.55	1.61	1.72	1.85
	10	0.88	0.9	1.19	1.37
	20	0.68	0.69	0.81	0.9