Publications

Résumé The demand for weather-sensitive products, such as beverages, ice creams, or chocolate varies with changes in temperature. Yet, retailers lack a framework to adapt the marketing mix elements, such as price and advertising, in line with such changes. We provide a theoretical framework to fill this gap by developing an analytical model to derive the optimal marketing mix when product demand depends on temperature. The model prescribes how price and advertising for different demand characteristics should be set following a temperature change. Integrating the temperature element in the marketing mix offers an original profit-enhancing strategy.
Mots clés Marketing mix, Weather-sensitivity, Temperature, Advertising, Pricing
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Résumé Après la publication du Soi et son cerveau (Rue d’Ulm, oct. 2018), ce volume vient clore la publication des œuvres de Popper en langue française (à l’exception de textes datés consacrés quasi exclusivement à la physique quantique). Les écrits de jeunesse montrent la genèse de l’œuvre poppérienne dans une Vienne éducatrice et matrice de savoirs neufs (réforme scolaire, néopsychologie, Cercle de Vienne) au sein d’un milieu cosmopolite progressiste, et l’environnement d’un penseur enthousiaste dans ses premières réalisations. Ils traitent aussi bien de la relation élève-enseignant que du processus de mémorisation, de l’idée de patrie que de l’« expérience vécue de la règle ».
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Résumé A principal targets agents organized in a network of local complementarities, in order to increase the sum of agents' effort. We consider bilateral public contracts à la Segal (1999). The paper shows that the synergies between contracting and non-contracting agents deeply impact optimal contracts: they can lead the principal to contract with a subset of the agents, and to refrain from contracting with central agents.
Mots clés Network, Synergies, Aggregate effort, Optimal group targeting
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Résumé We provide with an optimal growth spatio-temporal setting with capital accumulation and diffusion across space in order to study the link between economic growth triggered by capital spatio-temporal dynamics and agglomeration across space. We choose the simplest production function generating growth endogenously, the AK technology but in sharp contrast to the related literature which considers homogeneous space, we derive optimal location outcomes for any given space distributions for technology (through the productivity parameter A) and population. Beside the mathematical tour de force, we ultimately show that agglomeration may show up in our optimal growth with linear technology, its exact shape depending on the interaction of two main effects, a population dilution effect versus a technology space discrepancy effect.
Mots clés Growth, Infinite dimensional optimal control problems, Heterogeneous and continuous space, Agglomeration, Cap- ital mobility
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Résumé Dans Économie politique et philosophie chez Steuart et Hegel (1963), Paul Chamley examine l’intérêt que Hegel prit tôt pour l’économie. Il le rapporte à l’influence sur Hegel de la lecture, à Francfort, de l’Enquête publiée par James Steuart, ouvrage (aujourd’hui trop négligé) qui précéda La Richesse des nations d’Adam Smith. Quels thèmes majeurs Hegel y puisa-t-il ? Existe-t-il d’ailleurs une « économie hégélienne » per se ? Les notions hégéliennes en ce domaine sont-elles d’un bloc ? Outre l’effet du livre de Steuart, s’exercèrent les influences du caméralisme germanique traditionnel et du classicisme britannique naissant. Il faut donc montrer plus de circonspection que Chamley n’en eut et cet essai réévalue les vues de Hegel sur l’économie dans son époque.
Mots clés Steuart Sir James, Smith Adam, Hegel GWF, Chamley Paul, German Cameralists, Smith Adam, Steuart Sir James, Hegel GWF, Chamley Paul, Caméralisme allemand
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Résumé Background: In France, Health Regional Agencies (HRA) have to elaborate a Public Health Plan for the 5 coming years. For estimating future population health needs and associated costs to adapt the health services on the regional territory, the HRA in southeastern France requested a prospective analysis, based on demographic and epidemiologic scenarios about major chronic diseases, to evaluate future trends. Methods: Six chronic diseases were selected: diabetes (1 or 2), cardiovascular diseases, respiratory diseases, cancers, neurological diseases and dementia. We used medico-administrative data from the National health insurance fund, and adapted algorithms to identify people with these diseases. We calculated prevalence rates according to gender and age and used two alternative scenarios (a constant one, and a trend-based one) to estimate the number of people with chronic diseases in 2023 and 2028, starting in 2016. We also estimated future healthcare costs according a constant and a trend-based scenario. Results: The algorithms detect reasonable rates of disease compared to official rates available for 2016. Due to demographic (ageing) and/or epidemiologic trends, the number of people with chronic diseases will highly increase during the next ten years in the South of France region. For instance, between 2016 and 2028, there will be from 15% to 20% more people with diabetes. Associated costs will also be higher (+33% between 2016 and 2028), especially those granted to nursing care (+40%). Conclusions: Burden of diseases and health expenditures are going to increase in the future. Projections are needed to help policymakers anticipating the required health services adaptation. Medico-administrative database are an invaluable source of data to do so. The next step of this project will consist in estimating those trends for smaller geographical areas.
Mots clés Type 2, Cancer, Aging, Cardiovascular diseases, Diabetes mellitus, Nervous system disorders, Chronic disease, Dementia, Cost of illness, Demography, Geographic area, Health care costs, Population health, Fiberoptic examinations anoscopy high resolution, Gender, Public health medicine, Nursing care, Respiration disorders, Health insurance, Health services, Health expenditures
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Résumé Background: Each year, almost 400,000 new individuals are diagnosed with cancer in France and nearly half of them are in the working age. The disease was found to have a negative impact on professional life, especially for the most vulnerable cancer survivors. Literature reviews have pointed out the lack of studies focusing on the evaluation of interventions. In France, workstation layouts are recommended by the French law, but not mandatory to facilitate return to work. The aim of this study was to explore the effect of having a workstation layout after a cancer diagnosis on maintenance in employment five years after diagnosis. Methods: We used the French VICAN survey carried out in 2015/2016 on living conditions five years after a cancer diagnosis. Using propensity score matching, we matched two subsamples (with and without workstation layout) to investigate the effect of workstation layout taking into account the characteristics associated with the access to these arrangements. Results: Among the 1,514 individuals aged between 18 and 54 at diagnosis and employed in a salaried job at this time, three in five (61.2%) had a workstation layout within the five years following the diagnosis: 35.5% had a position type layout, 41.5% had a schedule layout, and 49.2% had a working time layout. Among those who had a workstation layout, 89.7% were still in employment five years after diagnosis against only 77.8% of those who did not so (p.value
Mots clés Feelings, Living arrangements, Cancer diagnosis, Cancer survivors, Job reentry, Statutes and laws, Diagnosis, Workplace, Survivors, Employment, Chronic disease, Cancer
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