We extend the standard quality-ladder model with heterogeneous workers by including efficiency wages and unions. We find that higher union bargaining power leads to a negative relationship between growth and unemployment. An increase in the supply of human capital, however, on the one hand...

This paper examines an economy with a large number of industries, each producing a different good. Technological change follows a Poisson process where firms improve their productivity through investment in R&D. The less there are firms in the economy or the more they can coordinate their...