I spent 10 years researching this topic in Argentina, Great Britain, and the US.  The Jewish prostitute  and pimp population were a quite visible minority due to legalized prostitution and the fact that many legal prostitutes registered with municipal governments and Jewish groups in Argentina and elsewhere decried the visibility of Jewish pimps and prostitutes to protect the women and lower anxieties about Anti-Semitism.  In fact, the Jewish prostitutes represented about 20% of the prostitute population, and most were Italians, Spanish and native-born. There are many books on this issue in English, Spanish, and Hebrew, and I would recommend them any time over encyclopedia articles.  My book is called Sex and Danger in Buenos Aires: Prostitution, Family and Nation in Argentina.  Other scholars include Sandra McGee Deutsch, Mir Yafitz, Haim Avni, and Edward Bristow.  All have extensive bibliographies.  Please read them.