At the head of IRI were leading members of the Christian Democracy party, such as Giuseppe Petrilli, president of the Institute from 1960 to 1979. In his writings, Petrilli developed a theory that emphasized the positive effects of the "IRI formula".
At the top of IRI were influential members of the Christian Democracy party, including Giuseppe Petrilli, who held the presidency from 1960 to 1979. In his publications, Petrilli proposed a theory that stressed the advantages of the "IRI formula".