New Amsterdam, Netherlands--Reed Elsevier named Jim Casella as CEO of Cahners Business Information. He succeeds Marc Teren, who was fired last year after less than 18 months in the post. Operating out of New York, Casella will report to Gerard van de Aast, CEO of Reed Elsevierâs Business to Business Division. Van de Aast served as interim CEO after Terenâs departure. Casella was most recently CEO of Round1, New York. He previously was president-CEO of PennWellâs PennEnergy and COO of IDG. In his new position, he will oversee such publications as Variety, Multichannel News, Wireless Week and Broadcasting & Cable.