Health Status and the Allocation of Time

In this paper, we quantify the effects of health on time allocation. We estimate that improvements in health status have large and positive effects on time allocated to home and market production and large negative effects on time spent watching TV, sleeping, and consuming other types of leisure. We find that poor health status results in about 300 additional hours allocated to unproductive activities per year. Plausible estimates of the cost of this lost time exceed $10,000. We also find that, for men, better health induces a substitution of market-produced goods for home-produced goods. Particularly, each additional minute spent in home production saves$0.37.labor supply, time allocation, health

Health Status and the Allocation of Time

We consider the relationship between health and time allocation. Better health is associated with more time allocated towards production on the market and at home, but less consumption of leisure. This suggests that health exerts large effects on market productivity, but larger effects on non-market productivity. These responses are higher for single people than for married people, perhaps reflecting a lack of market substitutes for the time of married people.Labor supply, Time Allocation, Health, Home Production

Health Status and the Allocation of Time

In this paper, we quantify the effects of health on time allocation. We estimate that improvements in health status have large and positive effects on time allocated to home and market production and large negative effects on time spent watching TV, sleeping, and consuming other types of leisure. We find that poor health status results in about 300 additional hours allocated to unproductive activities per year. Plausible estimates of the cost of this lost time exceed $10,000. We also find that, for men, better health induces a substitution of market-produced goods for home-produced goods. Particularly, each additional minute spent in home production saves$0.37.Labor Supply, Time Allocation, Health

Health status and the allocation of time

In this paper, we quantify the effects of health on time allocation. We estimate that improvements in health status have large and positive effects on time allocated to home and market production and large negative effects on time spent watching TV, sleeping, and consuming other types of leisure. We find that poor health status results in about 300 additional hours allocated to unproductive activities per year. Plausible estimates of the cost of this lost time exceed $10,000. We also find that, for men, better health induces a substitution of market-produced goods for home-produced goods. Particularly, each additional minute spent in home production saves$0.37

Des systemes simplifies aux combustibles modeles etude in situ du frittage d'oxydes d'actinides et de lanthanides

International audienceresume JSM 201

Titanium corrosion in molten glasses : Part 1: Immersion tests and corrosion kinetics

The kinetics and mechanisms of pure titanium corrosion in three glass melts are investigated in the 1050 to 1400 °C temperature range by Immersion tests. The corrosion layers formed at the metal/glass interface, the elemental concentration profiles in the glass and the corrosion rates are determined. Corrosion rates are reported on an Arrhenius diagram for each glass

Synthesis and characterization of thorium-bearing britholites

RADIOCHIn the field of the immobilization of tri- and tetravalent minor actinides, apatites and especially britholites were already proposed as good candidates. In order to simulate tetravalent minor actinides, the incorporation of thorium, through dry chemical routes, was studied in britholite samples of general formula Ca9Nd1−xThx(PO4)5−x(SiO4)1+xF2. The study showed that the incorporation of thorium was effective whatever the thorium reagent used or the grinding conditions considered. Nevertheless, it appeared necessary to use mechanical grinding (30 Hz, 15 min) before heating treatment (T = 1400 °C, 6 h) to improve the reactivity of powders and the sample homogeneity. In these conditions, the incorporation of thorium in the britholite structure occurred above 1100 °C. The heating treatment at 1400 °C led to single phase and homogeneous compounds. This work also underlined the necessity to prefer the coupled substitution Click to view the MathML source instead of (Nd3+, F−) left right double arrow (Th4+, O2−) in order to prepare pure and single phase samples in all the range of composition examined

Titanium corrosion in molten glasses : Part 2. Electrochemical study and corrosion mechanismus

In situ electrochemical experiments are carried out to determine the mechanisms of pure titanium corrosion in molten glasses. The corrosion layers formed at the metal/glass interface are systematically reported. The formal potentials of the TiIII/TiII and TiIV/TiIII redox couples are respectively positioned at -1.0 V and -0.7 V by coupling square wave voltammetry measurements and polarization of titanium rods. The potential of the BIII/B0 couple is estimated to be near -1.4 V. The results obtained by immersion tests and electrochemical measurements in glasses are compared. They are consistent in terms of corrosion rate variations and morphology of the corrosion scales. The corrosion mechanisms are described in the form of successive redox reactions between the glass and the substrate followed by diffusion of the formed species into the titanium substrate. It is demonstrated that Ti does not form spontaneously protective scales when immersed in molten glass and that protection can not be reached by either anodic or cathodic polarization