A Cross-Domain Collaborative Filtering Algorithm Based on Feature Construction and Locally Weighted Linear Regression

Table 3

Statistics of the filtered Amazon data.

Domain		Avg. # of ratings for each item	Avg. # of ratings for each user	Density
Books	500	41.37	35.30	7.06%
Music CDs	500	47.58	40.60	8.12%
DVDs	500	70.03	59.75	11.95%
VHS video tapes	500	60.12	51.30	10.26%