Voice and resistance: coalminers' struggles to represent their health and safety interests in Australia and New Zealand 1871–1925

The activism of coalmining unions in Australia, the UK, the USA and elsewhere securing improvements in safety including better legislation in the 19th and 20th centuries, has been widely researched and acknowledged. However, a relatively neglected aspect of this history was a campaign to secure worker inspectors (check-inspectors). These began in coalmining a century before similar measures were introduced for workers more generally as part of overhauling occupational health and safety laws in the 1970s/1980s. We document this struggle for mine safety in Australia and New Zealand, and the activities of check-inspectors in the period to 1925. Notwithstanding strong opposition from coal-owners and conservative governments, check-inspectors played an important role in safeguarding coalminers and improving the regulatory oversight of coalmines. Check-inspectors not only gave coalminers a ‘voice’ in OHS, but they also provided an exemplar of the value and legitimacy of worker’s ‘knowledge activism’. This system remains. Furthermore, the struggle is relevant to understanding contemporary debates about collective worker involvement in occupational health and safety

Factors affecting continued use of ceramic water purifiers distributed to Tsunami-affected Communities in Sri Lanka

Objectives  There is little information about continued use of point-of-use technologies after disaster relief efforts. After the 2004 tsunami, the Red Cross distributed ceramic water filters in Sri Lanka. This study determined factors associated with filter disuse and evaluate the quality of household drinking water. Methods  A cross-sectional survey of water sources and treatment, filter use and household characteristics was administered by in-person oral interview, and household water quality was tested. Multivariable logistic regression was used to model probability of filter non-use. Results  At the time of survey, 24% of households (107/452) did not use filters; the most common reason given was breakage (42%). The most common household water sources were taps and wells. Wells were used by 45% of filter users and 28% of non-users. Of households with taps, 75% had source water Escherichia coli in the lowest World Health Organisation risk category (<1/100 ml), vs. only 30% of households reporting wells did. Tap households were approximately four times more likely to discontinue filter use than well households. Conclusion  After 2 years, 24% of households were non-users. The main factors were breakage and household water source; households with taps were more likely to stop use than households with wells. Tap water users also had higher-quality source water, suggesting that disuse is not necessarily negative and monitoring of water quality can aid decision-making about continued use. To promote continued use, disaster recovery filter distribution efforts must be joined with capacity building for long-term water monitoring, supply chains and local production

Legal Status and U.S. Farm Wages

Using National Agricultural Workers Survey data, we estimate U.S. farm worker wage differentials by legal status. In order to adequately correct sample selection bias, we develop a Heckman-type two-stage method with an ordered probit model in the first stage and a wage equation model in the second stage.Farm Management,

Labor Cost and Technology Adoption: Least Squares Monte Carlo Method for the Case of Sugarcane Mechanization in Florida

The prospect of immigration reform has renewed farmers’ concerns of serious labor shortages and cost increases, which may urge highly labor-intensive specialty crop farmers to switch to less-labor-intensive technology. The large-scale mechanization of the Florida sugarcane harvest during the 1970s/80s serves as an historical example of how technologies evolved due to changes in local labor market conditions. We analyze the dynamic decision-making process of sugarcane farmers in the relevant period using net present value (NPV) approach and real options approach (ROA) with least squares Monte Carlo (LSMC).Crop Production/Industries, Labor and Human Capital, Research and Development/Tech Change/Emerging Technologies,

Implications of Proposed Immigration Reform for the U.S. Farm Labor Market

Specialty crop agriculture may be affected by immigration reform given that most farm workers are foreign-born and unauthorized for U.S. employment. Controlling for selection on legal status and job type according to skill level, this research examines the wage effects for workers with different characteristics in the U.S. and South.Labor and Human Capital,

PROPOSED IMMIGRATION POLICY REFORM & FARM LABOR MARKET OUTCOMES

The issue of legalization for unauthorized farm workers is examined in this paper. The analytical framework uses a treatment effects approach which casts legalization as a treatment under the assumption of heterogeneity. The results show an overall positive impact of legalization on farm worker wage outcomes and with the expected positive sorting on the gains from legal status.International Relations/Trade, Labor and Human Capital,

Farm Employment Transitions: A Markov Chain Analysis with Self-Selectivity

A stationary, first-order Markov chain model with selection bias correction for legal status is estimated by maxixmum likelihood methods using the National Agricultural Worker Survey data for 1989-2004 to evaluate the likelihood of workers staying in U.S. agriculture by legal status. Although the conditional steady state probability in US agriculture is highest for uanauthorized workers, there is little difference between legal statuses. Simulations of the estimated model indicate that a legal status change for unauthorized workers would result in only small changes in the steady state probability of being in US agriculture, particularly after 2001.Labor and Human Capital,

Labor Cost and Technology Adoption: Real Options Approach for the Case of Sugarcane Mechanization in Florida

Specialty crop farmers have expressed concern about labor shortages and cost increases which may arise with immigration reform. The large-scale mechanization of the Florida sugarcane harvest during the 1970s/80s serves as an historical example of how technologies evolved due to changes in local labor market conditions.Crop Production/Industries, Labor and Human Capital, Research and Development/Tech Change/Emerging Technologies,

Quantum dynamics of the avian compass

The ability of migratory birds to orient relative to the Earth's magnetic field is believed to involve a coherent superposition of two spin states of a radical electron pair. However, the mechanism by which this coherence can be maintained in the face of strong interactions with the cellular environment has remained unclear. This Letter addresses the problem of decoherence between two electron spins due to hyperfine interaction with a bath of spin 1/2 nuclei. Dynamics of the radical pair density matrix are derived and shown to yield a simple mechanism for sensing magnetic field orientation. Rates of dephasing and decoherence are calculated ab initio and found to yield millisecond coherence times, consistent with behavioral experiments

The U.S. Farm Labor Market Post-IRCA: An Assessment of Employment Patterns, Farm Worker Earnings and Legal Status

Immigration reform may significantly impact the specialty crops sector since more than half of the workforce is foreign-born and undocumented. Based on data from the National Agricultural Workers Survey, the trends pertaining to workers' legal status, employment and wage rates in the U.S. and Florida farm labor markets are examined.Immigration reform, legal status, specialty crops, employment, wage rates., Labor and Human Capital, J430,