The research population includes those Jewish youngsters who are defined by law as minors for whom a criminal file has been opened with the police and who have been referred to the Juvenile Probation Service. From 1948 until 1969, the rate of juvenile crime increased. From 1969 until 1977, there was a general, gradual downward trend in the rates of juvenile offenders. During the period of the study, the ratio of first offenders to recidivists remained relatively stable. The patterns of juvenile delinquency by offense also remained relatively stable. There was a significant decrease in the crime rate of the Afro-Asian group relative to the total number of offenders. Possibly the gap in the standard of living between the different ethnic groups is a central factor in the crime rates of these groups; consequently, a narrowing of the gap will contribute to diminishing disparities in the crime rates, as with the Afro-Asian group. Tables, figures, 15 notes, and 49 references are included.