Objective: To estimate the price elasticity of demand for South Africa and thereby contribute to growing the evidence base of the likely impact of excise taxes on cigarette demand in low-income and middle-income countries.
Methods: We employ the Deaton method, using wave 5 data from the South African National Income Dynamics Study, to estimate the cigarette price elasticity for South Africa. We used a sample of 6820 households.
Results: Of the 6 820 households in the sample for which we had sufficient data, 1341 (19.7%) spent money on tobacco. The price elasticity of demand for cigarettes is estimated at -0.86 (95% CI -1.37 to -0.35), implying that the demand for cigarettes in South Africa declines by 8.6% for every 10% increase in price.
Conclusion: The negative price elasticity estimate for South Africa indicates that increases in the excise tax are particularly effective in controlling cigarette consumption. However, given the presence of a significant illicit tobacco market in the country, it is important that authorities augment tax measures with strategies that curb the illicit trade in cigarettes.
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http://dx.doi.org/10.1136/bmjopen-2020-046279 | DOI Listing |
J Phys Condens Matter
January 2025
Mechanical Engineering, Virginia Tech, 635 Prices Fork Road, Blacksburg, Virginia, 24061-0131, UNITED STATES.
Magnetorheological elastomers (MREs) are soft magnetic composites that achieve tunable changes in stiffness and energy response in the presence of a magnetic field. Rigid particle composite (RC) MREs have been studied for decades for their potential applications to automotive dampers and robotic systems. Recently, magnetic fluid composite (FC) MREs have been developed which utilize magnetic fluids as inclusions to elastomers.
View Article and Find Full Text PDFHealth Econ
January 2025
School of Economics, Georgia Institute of Technology, Atlanta, Georgia, USA.
Understanding the behavior of populations of drug consumers has been and remains a topic of keen interest. Using a unique dataset on 25 districts from Bengal, India, from 1911 to 1925, we analyze whether populations of consumers treat alcohol, cannabis, and opium as economic substitutes or complements in a legal regime. Additionally, we examine responsiveness to prices and income.
View Article and Find Full Text PDFSci Rep
January 2025
Department of Theoretical Electrical Engineering and Diagnostics of Electrical Equipment, Institute of Electrodynamics, National Academy of Sciences of Ukraine, Beresteyskiy, 56, Kyiv-57, Kyiv, 03680, Ukraine.
In this paper, a comprehensive energy management framework for microgrids that incorporates price-based demand response programs (DRPs) and leverages an advanced optimization method-Greedy Rat Swarm Optimizer (GRSO) is proposed. The primary objective is to minimize the generation cost and environmental impact of microgrid systems by effectively scheduling distributed energy resources (DERs), including renewable energy sources (RES) such as solar and wind, alongside fossil-fuel-based generators. Four distinct demand response models-exponential, hyperbolic, logarithmic, and critical peak pricing (CPP)-are developed, each reflecting a different price elasticity of demand.
View Article and Find Full Text PDFHealth Econ
January 2025
Centro de Investigaciones Económicas y Empresariales, Universidad Privada Boliviana, La Paz, Bolivia.
In this research we show that ambitious increases in tobacco tax rates can substantially reduce tobacco consumption, increase fiscal revenue, and provide net positive social benefits even in contexts of low consumption prevalence and intensity. Low nicotine intake still constitutes a grave disease risk factor, and the effectiveness of tax increases might be questioned if income effects are small. We adapt spatial variation of price methodologies to deal with low prevalence and intensity, censored data, and small samples using the Bolivian case as an illustration.
View Article and Find Full Text PDFSci Rep
January 2025
School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China.
The ore mining sites commonly experience slope instability, which is causing concern for the workers' safety and the operation's stability. Considering the Ziluoyi iron ore mining site as a case study, uniaxial compression strength and shear tests are performed on the lower disk peripheral rock, ore body, and upper disk peripheral rock, leading to the extraction of compressive strength and elastic modulus (lower disk: 77.7 MPa-9.
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