This book explores several controversial issues about the Linder Hypothesis: Income and Substitution effects in International trade, alternative interpretations of Linder hypothesis, a product-quality view of Linder., Demand Structure and International trade; vertical product differentiation in trade; Aggregate demand shifts and Linder hypothesis, distribution of trade flows and choice of trade partners, an extended Linder Model to trade, taking stock of intra-industry trade, Global General Equilibrium of trade Specialization.