1. volunteer to social work case matching: assign volunteers to social work case to maximize user satisfaction and global utility. (G1)

1. volunteer user categorization (profiling): identify user groups to apply precise content targeting and mobilization/management strategy (G2)

Solving G2 will help G1 by improving matching result given sparse and incomplete data. Ideally both tasks can be accomplished in a joint model to ensure optimality.

• personnel assignment problem
• bilateral/two-way recommendation problem
• user categorization/profiling for recommendation