1 Introduction 2 Fundamentals of Market Equilibrium Analyses 3 Regulations 4 Ride-pooling Services 5 Congestion Externalities 6 Ride-Pooling in the Presence of Traffic Congestion 7 Revisiting Government Regulations 8 Competition Between Platforms 9 Third-party Integrator 10 Ride-sourcing and Public Transit 11 Matching Time Interval and Radius 12 Labor Supply Analysis 13 Conclusion and Future Work