In the process of using discrete element method (DEM) to simulate the interaction between straw and machinery, because the existing straw model does not have destructible characteristics, some interaction process cannot be simulated, which affects the accuracy of simulation. In order to solve...

This paper analyzes the effects of tying arrangements on market competition and social welfare in two-sided markets when economic agents can engage in multi-homing; that is, they can participate in multiple platforms in order to reap maximal network benefits. The model shows that tying induces...