Density (dis)economies in transportation: revisiting the core-periphery model

We study how density (dis)economies in interregional transportation influence location patterns in a standard new economic geography model. Density economies may well delay the occurrence of agglomeration when compared to the case without such economies, while agglomeration is both more likely and more gradual under density diseconomies than under density economies.density (dis)economies economic geography transport costs core-periphery model

Feeding the Cities and Greenhouse Gas Emissions - Beyond the Food Miles Approach

In this paper, we study the impact of urbanization on the location of agricultural production and the GHG emissions related to transportation activities. We develop an economic geography model where the location of agricultural activities and urban population are endogenous. We show that increasing agricultural yields induce the spatial concentration of agricultural production in the least urbanized region if agricultural transport costs are relatively low and in the most urbanized region otherwise. In addition, interregional trade in agricultural commodities is desirable to reduce GHG emissions, except when urban population is equally split between cities. However, the market may induce too much agglomeration of agricultural production when yields are high and when collection costs are low.Urbanization, agriculture location, transport, Environmental Economics and Policy, Food Security and Poverty, Q10, Q54, R12,

"Is the regulation of the transport sector always detrimental to consumers?"

The aim of this paper is to qualify the claim that regulating a competitive transport sector is always detrimental to consumers. We show indeed that, although transport deregulation is beneficial to consumers as long as the location of economic activity is fixed, this is no longer true when, in the long run, firms and workers are freely mobile. The reason is that the static gains due to less monopoly power in the transport sector may well map into dynamic dead-weight losses because deregulation of the transport sector leads to more inefficient agglomeration. This latter change may, quite surprisingly, increase consumer prices in some regions, despite a more competitive transport sector. Transport deregulation is shown to map into aggregate consumer welfare losses and more inequality among consumers in the long run.

"Trade and the structure of cities"

Our purpose is to investigate how the interplay between trade, commuting and communication costs shapes the economy at both the interregional and intra-urban levels. Specifically, we study how economic integration affects the internal structure of cities and show how decentralizing the production and consumption of goods in secondary employment centers allows firms located in a large city to maintain their predominance. Several new results in both economic geography and urban economics are established, which all agree with empirical evidence.

Does Input Trade Liberalization Boost Downstream Firms Exports? Evidence from the French Agrofood Sector

intermediate good, heterogeneous firms, agrifood sector, trade liberalization., Agribusiness, International Relations/Trade,

Taxe carbone globale, effet taille de marché et mobilité des fi rmes

Nous analysons l'impact et les déterminants d'une taxe carbone globale dans une économie imparfaitement intégrée composée de pays de différente taille. A l'aide d'un modèle de commerce et de localisation, nous montrons tout d'abord que la concentration de firmes dans le pays disposant d'un avantage de taille de marché accroît les émissions totales de CO2. L'intro- duction d'une taxe carbone globale conduit alors à des délocalisations de fi…rmes du grand pays vers le petit pays de sorte que même …fixée à un taux unique, une …fiscalité carbone ne serait pas neutre du point de vue de la géographie économique. Enfin, parce qu'elles conduisent à une réduction des émissions mondiales de CO2, ces relocalisations améliorent l'efficacité environnementale de la taxe carbone.Taxe carbone globale, economie geographique

Taxe carbone globale, effet taille de marché et mobilité des firmes

Nous analysons l'impact et les déterminants d'une taxe carbone globale dans une économie imparfaitement intégrée composée de pays de différente taille. A l'aide d'un modèle de commerce et de localisation, nous montrons tout d'abord que la concentration de firmes dans le pays disposant d'un avantage de taille de marché accroît les émissions totales de CO2. L'intro- duction d'une taxe carbone globale conduit alors à des délocalisations de firmes du grand pays vers le petit pays de sorte que même fixée à un taux unique, une fiscalité carbone ne serait pas neutre du point de vue de la géographie économique. Enfin, parce qu'elles conduisent à une réduction des émissions mondiales de CO2, ces relocalisations améliorent l'efficacité environnementale de la taxe carbone

Divergent Synthesis of C5‐Heteroatom Substituted Oxazoles

5‐Oxazoyl‐sulfamates have been profiled as versatile building blocks for modifications of oxazoles with various nucleophiles. The unified approach provides a diversification platform to directly access 5‐amino‐oxazoles, 5‐oxazolyl‐sulfides, and 5‐oxazoyl‐aryl ethers from a single precursor

Polisemantika: creación de un espectáculo de música contemporánea para percusión, desde el trabajo colaborativo y la transdisciplinariedad

Polisemantika es un espectáculo de percusión de música contemporánea, creado entre artistas de diferentes disciplinas artísticas. Este trabajo habla sobre el proceso de investigación y creación, y sobre como hemos podido aplicar en la practica la transdisciplinariedad y el trabajo colaborativo, trabajando sobre obras ya escritas y obras creadas por nosotras durante el proceso de investigación-creación.Polisemantika is a percussion contemporary music show, created between diferent art disciplines artists. This investigation address the investigation-creation process from the way we aplied the colaborative work and trandisciplinarity, working on writed percussion works and created by ourself during the investigation-creation process

Integrated trajectories of the maternal metabolome, proteome, and immunome predict labor onset

Estimating the time of delivery is of high clinical importance because pre- and postterm deviations are associated with complications for the mother and her offspring. However, current estimations are inaccurate. As pregnancy progresses toward labor, major transitions occur in fetomaternal immune, metabolic, and endocrine systems that culminate in birth. The comprehensive characterization of maternal biology that precedes labor is key to understanding these physiological transitions and identifying predictive biomarkers of delivery. Here, a longitudinal study was conducted in 63 women who went into labor spontaneously. More than 7000 plasma analytes and peripheral immune cell responses were analyzed using untargeted mass spectrometry, aptamer-based proteomic technology, and single-cell mass cytometry in serial blood samples collected during the last 100 days of pregnancy. The high-dimensional dataset was integrated into a multiomic model that predicted the time to spontaneous labor [R = 0.85, 95% confidence interval (CI) [0.79 to 0.89], P = 1.2 × 10−40, N = 53, training set; R = 0.81, 95% CI [0.61 to 0.91], P = 3.9 × 10−7, N = 10, independent test set]. Coordinated alterations in maternal metabolome, proteome, and immunome marked a molecular shift from pregnancy maintenance to prelabor biology 2 to 4 weeks before delivery. A surge in steroid hormone metabolites and interleukin-1 receptor type 4 that preceded labor coincided with a switch from immune activation to regulation of inflammatory responses. Our study lays the groundwork for developing blood-based methods for predicting the day of labor, anchored in mechanisms shared in preterm and term pregnancies