Prior research suggests that participating in corporate social responsibility (CSR) activities can lead to higher future productivity. However, the empirical evidence is still scarce. The purpose of this study is to examine the relationship between CSR and future firm productivity in the U.S....

Details about the movement of trucks on postal express lines are investigated to improve the performances of mail distribution. A mixed driving pattern of trucks is introduced to minimize the transportation cost of a postal express line network with a service level requirement. We formulate this...