I illustrate that the welfare improvement property of the Melitz model is due to the shape of the aggregate labor demand curve, which slopes upwards. By slightly changing some assumptions in the model, this curve may have a negative slope. In this case, increases in aggregate productivity result...

Does foreign aid enhance aggregate human welfare? This paper attempts to answer this question by using a panel of twenty-eight countries, covering the period from 1990 to 2014. It explores intra country variation by splitting the sample into low-income and middle-income countries. Combined with...

Sectoral heterogeneity has been shown to affect country-level welfare gains from trade that can be calculated by sector-specific trade elasticities and home expenditure shares. However, empirical analyses of multi-sector models are restricted to a limited number of countries and sectors, mostly...