Abstract
What are the comparative contributions of composer and librettist to the aesthetic impact of great operas? This question was empirically answered using a sample of 911 operas by fifty-nine composers. The aesthetic success of each opera was gauged by a composite measure that included performance and recording frequencies as well as archival indicators. The predictor variables were both idiographic (e.g., the specific identities of the librettists and the literary sources) and nomothetic (e.g., literary genre, language, librettist's age, and experience). After introducing appropriate control variables, the multiple-regression analyses demonstrated that composers play a much bigger role in determining operatic impact than do librettists or their libretti. The identity of the composers alone accounted for almost half of the variance in aesthetic success. As far as opera is concerned, the music is aesthetically more crucial than are the words.