Estimating a collective household model with survey data on financial satisfaction

We estimate a collective household model with survey data on financial satisfaction from the European Community Household Panel. Our estimates suggest that cohabitating individuals enjoy returns to scale in consumption that are towards the larger end of the range of estimates reported in the literature. They also suggest that the share of household income provided by the female partner is a significant determinant of her share of household consumption in most countries of the countries we study.Consumption, returns to scale, collective household models

Gamma-ray spectrometry in the field: Radioactive heat production in the Central Slovakian Volcanic Zone

We report 62 sets of measurements from central-southern Slovakia, obtained using a modern portable gamma-ray spectrometer, which reveal the radioactive heat production in intrusive and extrusive igneous rocks of the Late Cenozoic Central Slovakian Volcanic Zone. Sites in granodiorite of the Štiavnica pluton are thus shown to have heat production in the range ~ 2.2–4.9 μW m− 3, this variability being primarily a reflection of variations in content of the trace element uranium. Sites in dioritic parts of this pluton have a lower, but overlapping, range of values, ~ 2.1–4.4 μW m− 3. Sites that have been interpreted in adjoining minor dioritic intrusions of similar age have heat production in the range ~ 1.4–3.3 μW m− 3. The main Štiavnica pluton has zoned composition, with potassium and uranium content and radioactive heat production typically increasing inward from its margins, reflecting variations observed in other granodioritic plutons elsewhere. It is indeed possible that the adjoining dioritic rocks, hitherto assigned to other minor intrusions of similar age, located around the periphery of the Štiavnica pluton, in reality provide further evidence for zonation of the same pluton. The vicinity of this pluton is associated with surface heat flow ~ 40 mW m− 2 above the regional background. On the basis of our heat production measurements, we thus infer that the pluton has a substantial vertical extent, our preferred estimate for the scale depth for its downward decrease in radioactive heat production being ~ 8 km. Nonetheless, this pluton lacks any significant negative Bouguer gravity anomaly. We attribute this to the effect of the surrounding volcanic caldera, filled with relatively low-density lavas, ‘masking’ the pluton's own gravity anomaly. We envisage that emplacement occurred when the pluton was much hotter, and thus of lower density, than at present, its continued uplift, evident from the local geomorphology, being the isostatic consequence of localized erosion. The heat production in this intrusion evidently plays a significant role, hitherto unrecognized, in the regional geothermics

The Effect of an Employer Health Insurance Mandate on Health Insurance Coverage and the Demand for Labor: Evidence from Hawaii

Over the past few decades, policy makers have considered employer mandates as a strategy for stemming the tide of declining health insurance coverage. In this paper we examine the long term effects of the only employer health insurance mandate that has ever been enforced in the United States, Hawaii's Prepaid Health Care Act, using a standard supply-demand framework and Current Population Survey data covering the years 1979 to 2005. During this period, the coverage gap between Hawaii and other states increased, as did real health insurance costs, implying a rising burden of the mandate on Hawaii's employers. We use a variant of the traditional permutation (placebo) test across all states to examine the magnitude and statistical properties of these growing coverage differences and their impacts on labor market outcomes, conditional on an extensive set of covariates. As expected, the coverage gap is larger for workers who tend to have low rates of coverage in the voluntary market (primarily those with lower skills). We also find that relative wages fell in Hawaii over time, but the estimates are statistically insignificant. By contrast, a parallel analysis of workers employed fewer than 20 hours per week indicates that the law significantly increased employers' reliance on such workers in order to reduce the burden of the mandate. We find no evidence suggesting that the law reduced employment probabilities.health insurance, employment, hours, wages

Estimating a Collective Household Model with Survey Data on Financial Satisfaction

We estimate a collective household model with survey data on financial satisfaction from the European Community Household Panel. Our estimates suggest that cohabitating individuals enjoy returns to scale in consumption that are towards the larger end of the range of estimates reported in the literature. They also suggest that the share of household income provided by the female partner is a significant determinant of her share of household consumption in most of the countries we study.consumption, returns to scale, collective household models

International experience of gas emission and gas outburst prevention in underground coal mines

With increasing depth of cover, control of gas emissions and prevention of gas outbursts has become a more and more important issue in mine design and mine operation. Long term experience in these fields exists, especially in Australia, Germany, China, Kazakhstan and Ukraine. Based on local conditions including geology, market conditions and mining regulations, different approaches have been developed in these countries. Changes in these parameters have however exposed the limitations of traditional solutions. While the Australian approach is based on the premise that gas content will be reduced below specific threshold values ahead of mining, opportunities of pre-drainage are limited in low permeability coal such as that encountered e.g. in Germany and China. In the case of multi seam mining, a highly effective increase in permeability can however be achieved through pressure relief by unconventional mining sequences. Although practiced at several mines in Europe and Asia, realising this in open market conditions requires a high quality of planning in regard to mine layout, mine development and gas drainage as well as the appropriate geotechnical assessments. A key factor is access and extraction of the first seam at or near to virgin gas contents. Mining at high gas contents by applying local exploration and pressure relief drilling has been practiced in a successful and safe way in several European mines. This has to be connected with a proper management system and safety system, allowing efficient reactions to identified hazards. Apart from international experience and development, the paper will also discuss current and future approaches of technology transfer. Merging the future development in gas drainage with unconventional approaches is therefore an opportunity for accessing deep and difficult deposits