A price discrimination model is proposed to explain extraneous information provided by internet sales sites for agricultural inputs. Whether an informative site is offered depends on price discrimination potential, which depends on how much farmers reveal heterogeneity by internet behavior....

Previous studies have found underestimation of risk, or overconfidence, to be a key factor in entrepreneurship. We use a simple model of competitive equilibrium to show that an irrational under-estimation of risk provides a competitive advantage leading to a greater chance of survival under...