He also holds a degree from Harvard, and has studied at The Free University of Berlin on a Fulbright Fellowship. A specialist in Czech music, he has published articles in Musical Quarterly and multiple Czech journals, as well as chapters in Nineteenth Century Chamber Music (Schirmer, 1998), and in Janáček and His World (Princeton, 2003). His book Janáček Beyond the Borders was published by the University of Rochester Press in 2009. His more recent work deals with institutional support for professional string quartets in the United States in the mid-20th Century. Katz has also written for The New York Times and the San Francisco Opera and spoken at Lincoln Center and Carnegie Hall. He is an enthusiastic amateur violist and chamber music player.