In the entry literature, researchers sometimes use revenues as a proxy for profits because this is the only data available. Doing so could seriously bias the results.

In this article, the <italic>p</italic>-median model is used to find the location of retail stores that minimizes CO₂ emissions from consumer travel. The optimal location is then compared with the existing retail location, and the excess CO₂ emissions compared with the optimal solution is calculated. The results...