Aside from his official position, Gamaliel stood in learning on an equal footing with the legal teachers of his time. Many of his halakhic opinions have been handed down. Sometimes the united opinion of Gamaliel and Eliezer ben Hyrcanus is opposed to that of Joshua ben Hananiah and sometimes Gamaliel holds a middle position between the stricter opinion of the one and the more lenient view of the other. Gamaliel assented to certain principles of civil law which have been transmitted in the name of Admon, a former judge in Jerusalem, and which became especially well known and were authoritative for ensuing periods.