77,119 research outputs found

    Demand for Food of Indonesian Households: Evidence from Longitudinal Data

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    food demand, QUAIDS, Indonesia, Consumer/Household Economics, D11, D12,

    Public Response to Large-Scale Produce Contamination

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    Consumer/Household Economics, Food Consumption/Nutrition/Food Safety, D12, D01, Q13,

    Low temperature structural effects in the (TMTSF)2_2PF6_6 and AsF6_6 Bechgaard salts

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    We present a detailed low-temperature investigation of the statics and dynamics of the anions and methyl groups in the organic conductors (TMTSF)2_2PF6_6 and (TMTSF)2_2AsF6_6 (TMTSF : tetramethyl-tetraselenafulvalene). The 4 K neutron scattering structure refinement of the fully deuterated (TMTSF)2_2PF6_6-D12 salt allows locating precisely the methyl groups at 4 K. This structure is compared to the one of the fully hydrogenated (TMTSF)2_2PF6_6-H12 salt previously determined at the same temperature. Surprisingly it is found that deuteration corresponds to the application of a negative pressure of 5 x 102^2 MPa to the H12 salt. Accurate measurements of the Bragg intensity show anomalous thermal variations at low temperature both in the deuterated PF6_6 and AsF6_6 salts. Two different thermal behaviors have been distinguished. Low-Bragg-angle measurements reflect the presence of low-frequency modes at characteristic energies {\theta}E_E = 8.3 K and {\theta}E_E = 6.7 K for the PF6_6-D12 and AsF6_6-D12 salts, respectively. These modes correspond to the low-temperature methyl group motion. Large-Bragg-angle measurements evidence an unexpected structural change around 55 K which probably corresponds to the linkage of the anions to the methyl groups via the formation of F...D-CD2 bonds observed in the 4 K structural refinement. Finally we show that the thermal expansion coefficient of (TMTSF)2_2PF6_6 is dominated by the librational motion of the PF6_6 units. We quantitatively analyze the low-temperature variation of the lattice expansion via the contribution of Einstein oscillators, which allows us to determine for the first time the characteristic frequency of the PF6 librations: {\theta}E_E = 50 K and {\theta}E_E = 76 K for the PF6_6-D12 and PF6_6-H12 salts, respectively

    Can Taxes on Calorically Sweetened Beverages Reduce Obesity?

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    Beverage tax, obesity, overweight, Food Consumption/Nutrition/Food Safety, D12, H2, I18,

    Consumer Issues and Demand

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    Consumer/Household Economics, Livestock Production/Industries, D12, F13,

    Advertising in the U.S. Non-Alcoholic Beverage Industry: Are Spillover Effects Negative or Positive? Revisited using a Dynamic Approach

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    Agricultural and Food Policy, Consumer/Household Economics, Demand and Price Analysis, D11, D12,

    Household food expenditures in the United States: A Bayesian MCMC approach to censored equation systems

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    We apply a Bayesian Markov Chain Monte Carlo (MCMC) technique, along with data augmentation to accommodate censoring in the dependent variables, to the estimation of a large expenditure system of food expenditures. Our finding of significant error covariance estimates justifies estimation of the system in improving statistical efficiency. Income, household composition, regions and other socio-demographic variables are found to play significant roles in determining household food expenditures.Bayesian MCMC, Censored equation system, Consumer Expenditure Survey, Food Consumption/Nutrition/Food Safety, C11, C34, D12, C11, C34, D12,

    Dynamics in the Use of Drugs

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    C41; D12; I19;alcohol;tobacco;cannabis;cocaine;ecstasy;drug use;age of onset

    A Comparative Analysis of US and Canadian Consumers' Perceptions Towards BSE Testing and the use of GM Organisms in Beef Production: Evidence from a Choice Experiment

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    Replaced with revised version of paper 07/24/07.choice experiments, multinomial logit, beef labeling, Livestock Production/Industries, D12, L66, C35,

    RURAL BROADBAND AVAILABILITY AND ADOPTION IN OKLAHOMA

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    Broadband Adoption, Rural Broadband Availability, Broadband Infrastructure, Broadband Digital Divide, Community/Rural/Urban Development, Research and Development/Tech Change/Emerging Technologies, R22, D12,
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