In an experiment, we test the impact of quality certificates on donations to a charity. When presented with a quality certificate, participants chose higher donations by approximately 10%. This effect is significant for donations out of prize money and actual own money donations, and not...

I present a model of vertical product differentiation and exit where a domestic and a foreign firm face fixed setup costs and quality-dependent costs of production and compete in quality and price in the domestic market. Quality-dependent costs are quadratic in qualities, but independent of the...