We study how decisions made by organ procurement organizations (OPOs)--non-profits that coordinate organ recovery from deceased donors--affect the availability of organs for transplant in the United States. We develop a structural econometric model of a pivotal OPO decision: whether to approach...

Random coefficient multinomial logit models (Berry et al. 1995) are widely used to estimate customer preferences from sales data. However, these estimation models can only allow for products with positive sales; this selection leads to highly biased estimates in long tail markets--i.e., markets...