Net exports, consumption volatility and international business cycle models

Conventional two-country RBC models interpret countercyclical net exports as reflecting primarily the dynamics of capital. I show that, quantitatively, theoretical economies rely on counterfactual terms of trade effects: trade fluctuations, on the contrary, are driven by consumption smoothing, thus generating procyclical net trade in goods. I then consider a class of preferences that embeds home production in a reduced form: consumption volatility increases so that countercyclical net exports reflect primarily a strong relation between consumption and imports, as in the data. The major discrepancy between theory and data concerns the variability of international prices.