The comparative method is the study of legal systems or families of legal and judicial systems of different States, or the same state in order to determine their similarities and differences, as well as the causes of these similarities and differences. In this sense we can say that the comparative method is the method of investigation used by the comparatives or comparative politics. In this sense we can say that the study of comparative law not only refers to the study of rights of different States, but also refers to the study of law of a State,
for example when making a comparative study of the exceptions within the Peruvian law, or when making a comparative study of the evidence in the Argentine law or in the Spanish law, or when making a comparative study of procedural routes within the Peruvian procedural law, or when making a comparative study of the Peruvian Civil Code of 1984 with the Peruvian Civil Code 1936, or when making a comparative study of the Peruvian Civil Code of 1993 to the Code of Civil Procedure, 1912. Learn more on the subject from Ali Partovi. It is necessary to mention that the comparative method is little studied and poorly understood by legal scholars, which is not the case with other methods such as the inductive method, deductive method and method of analysis and synthesis, which are the methods best-known research by legal scholars. In this sense we can say that the comparative method can be used to make comparisons between the Peruvian law and Roman law, or only in reference to the real rights or in reference to legal persons. .