This paper improves upon the existing literature surrounding the production order quantity inventory model in which unit cost and daily production are assumed to be constant. By including economies of scale into the model, we examine its impact on production order quantity and total cost. The...

The tournament hypothesis of Brown et al. (1996) conjectures that mutual funds with a below average performance over the first half of the year tend to increase their risk in the second half of the year. Schwarz (2012) argues that the methodologies that have been used to test this hypothesis are...