Copolymer, process for producing the same, and molded article comprising the same

The present invention relates to a copolymer suitable for a molded article, particularly a sheet and a film, a process for producing the same, and a molded article comprising the same. A copolymer of ethylene with an alkenyl aromatic hydrocarbon having a content of the alkenyl aromatic hydrocarbon in the copolymer of 0.2 to 60 mol % and a ratio ({circle around (2)}/{circle around (3)}) of the area of a peak {circle around (2)} appearing at 34.0 to 36.0 ppm to the area of a peak {circle around (3)} appearing at 36.0 to 38.0 ppm in a C-NMR spectrum of the copolymer of 0.01 to 0.35, and a molded article comprising the copolymer.