Aplicase a análise económica ao comportamento individual no momento mesmo de decidir casar, é dicer, de aceptar unha oferta matrimonial. Esta investigación realizase no marco dun modelo de búsqueda. Asemade identificanse os factores que influen en dita decisión. A teoría pode reproducir certos feítos da realidade como a actual elevada idade da xente ao casar, e exténdese ao caso da decisión de ser noivo e da formación das parellas de feíto. Finalmente realizouse unha calibración con datos de España 1940-1991. Partindo do feíto que a porcentaxe de casados crece á mesma taxa que o volume de persoas en idade de casemento, obtivose unha taxa natural de solteiro
An economlc approach is applied to the individual behaviour in the same moment of decidíng to get married; that ís of acceptlng a marital proposítíon. This research is carried out within the framework of a search model. The factors that influence on such decision are identífíed. A theory can reproduce certaín facts of reality such as the actual high age of people when getting married and ít is extended to the case of the decision of becoming a "fiancé" or forming unmarried couples. Finally, an calibration will data from Spain 1940-1991 was performed. Takíng as assumption the fact that the percentage of married people grows at the same rata as the number o people in marriage age, a natural rate of single people was obtained