job involvement, defined as the extent to which one's psychological identification with the job, plays an important role in facilitating effective management. This study examines the causes of job involvement and the influences of job involvement on organizational commitment and job performance, in a case study of the Taipei Municipal Government. A model of job involvement, constructed from multiple theories: individual dispositions, organizational situations, a mixture of both. and purposive calculations, was tested by secondary data as well as with interviews of managers. Among others, results indicate that job attributes and self- influence were the top two predictors of job involvement, that job involvement significantly influences organizational commitment, and also, job performance, though the influence from a third factor needs to be recognized.