Purpose – The purpose of this paper is to analyze a market for microfinance in a region of a developing nation in which all projects are either of high or low quality. There is adverse selection because only borrowers know whether their project is of high or low quality but the microfinance...

We first construct three measures of the expected damage from the unintentional introduction of alien species into a country called Home. We then focus on four market structures. First, perfect competition prevails in both Home and Foreign and Home is a small country. Second, the Home and the...