This paper explores the role played by product variety and quality in a real business cycle model. Firms are heterogeneous in terms of their specific quality as well as pro- ductivity levels. Firms which have costly technology enter in a period of high aggregated demand and produce high quality...

This paper revisits Schumpeterian destruction in a DSGE model based on monopolistic competition. Firms enter the market through a free entry condition and exit endogenously depending on their specific productivity level. The mechanism of endogenous destruction among heterogeneous firms is based...

This paper analyzes equity and bond positions in a two-country DSGE model where the number of varieties, i.e. extensive margin is endogenously determined. Households take care about not only the price of goods but also the variety of goods they consume. The welfare-based real exchange rate...