Deep Collaborative Filtering: A Recommendation Method for Crowdfunding Project Based on the Integration of Deep Neural Network and Collaborative Filtering

Table 2

Data sets with different sparsity.

Dataset	Investments per capita	Sparsity (%)	Number of investors	Number of items	Total number of investments
Low-sparse data	9 times or more	94.36	639	220	7922
Moderately sparse data	5 times or more	96.81	2986	229	21847
Extremely sparse data	3 times or more	97.95	8598	230	40542