In this paper, we describe a novel iterative procedure called SISTA to learn the underlying cost in optimal transport problems. is hybrid between two classical methods, coordinate descent (“S”-inkhorn) and proximal gradient (“ISTA”). It alternates phase of exact minimization over potentials parameters cost. We prove that method converges linearly, illustrate on simulated examples it significant...

Mammals re-entered the oceans less than 60 million years ago. The transition from a terrestrial to an aquatic lifestyle required extreme morphological and behavioural modi¢cations concomitant with fundamentally di¡erent locomotor mechanisms for moving on land and through water. Energetic transport costs typically re£ect such di¡erent locomotor modes, but can not be discerned from the fossil rec...

in this paper, the distribution network for multi-level supply chain has been studied. products produced in factories are sent to customers through warehouses and distribution centers based on specific demands. warehouses as holding inventory facilities are located close to factories and the distribution centers are placed in the most accessible locations for services near customers. each item ...

We model adjustment costs in a general-equilibrium setting using a “transport sector.” This sector provides services needed to reallocate a factor of production across two other sectors. A market imperfection in the transport sector causes adjustment to occur too slowly in the absence of government intervention. The government has a restricted menu of second-best policies to remedy this imperfe...

This paper deals with the social costs of transport in Europe and with the problems associated with an improvement of environmental quality. It is in view of the high social costs of the transport sector and its close link with our welfare society necessary to identify and critically review strategie development scenarios for this sector. The paper gives an overview of related problems and issu...

There has been great focus in the recent trade theory literature on the introduction of firm heterogeneity into trade models. This introduction has highlighted the importance of the entry/exit decision of firms in response to changes in trade barriers. However, it is typical in many of these models to use iceberg transport costs as a general form of trade barriers that can be interchangeable wi...

In this paper we consider a 3-echelon, multi-product supply chain design model with economies of scale in transport and warehousing that explicitly takes transport frequencies into consideration. Our model simultaneously optimizes locations and sizes of tank farms, material flows, and transport frequencies within the network. We consider all relevant costs: product cost, transport cost, tank re...