%0 Journal Article %T Measure equivalence rigidity of the mapping class group %A Yoshikata Kida %J Mathematics %D 2006 %I arXiv %R 10.4007/annals.2010.171.1851 %X We show that the mapping class group of a compact orientable surface with higher complexity has the following extreme rigidity in the sense of measure equivalence: if the mapping class group is measure equivalent to a discrete group, then they are commensurable up to finite kernel. Moreover, we describe all lattice embeddings of the mapping class group into a locally compact second countable group. We also obtain similar results for finite direct products of mapping class groups. %U http://arxiv.org/abs/math/0607600v1