In a recent survey of intra-industry trade indices Kol and Mennes (1986) suggested to make a basic distinction between the study of matching trade flows and that of the similiarity oftrade patterns. The present paper shows that in both cases measures of intra-industry trade may be expressed...

Inequality, bi-polarization and polarization are related but distinct concepts aiming at analysing the income distribution. This paper first recalls the main differences between these three notions of inequality, bipolarization and polarization and then suggests using the so-called Shapley...