Retailers, from fashion stores to grocery stores, have to decide what range of products to offer, i.e., their product assortment. Frequent introduction of new products, a recent business trend, makes predicting demand more difficult, which in turn complicates assortment planning. We propose and...

We study a rail track access charging policy proposed by the Australian Rail Track Corporation (ARTC), in which a discount on access charges is offered if above-rail operators employ the “efficient train”. The efficient train is a train with a particular length, which results in the...

We consider a setting in which a not-for-profit rail infrastructure provider divides the costs of track maintenance and renewals and the costs of managing track access proportionally among above-rail operators based on their usage. We study a proposed access charge policy aimed at incentivizing...