(weak) core, unlike in many-to-one matching markets (Blair, 1988). In this paper, we seek a theoretical foundation for …It is known that in two-sided many-to-many matching markets, pair-wise stability is not logically related with the …-partner matching problem that includes two-sided matching problems as special cases. Under the same preference restriction, we also …

-emptiness of the strong core and the second domain restriction ensures non-emptiness of the weak core of the corresponding hedonic … games. Moreover, an element of the strong core under friends appreciation can be found in polynomial time, while finding an … element of the weak core under enemies aversion is NP-hard. We examine also the relationship between our domain restrictions …

"intuitive" hybrid solution concept, the free-riding-proof core, which is always nonempty but does not necessarily achieve global …