Nine, Putnam [...] and Tabellini [...] have proposed that "civic trust" is a determinant of regional differences in economic development in Italy and in western Europe. In this connection it is interesting to note that Rindermann (2008) has shown that "interpersonal trust" is correlated at 0.49 with intelligence across 41 nations. It may be that IQ is a determinant of "civic/interpersonal trust" and this accounts for the relationship between civic trust and economic development in western Europe found by Tabellini [...].
