Australian Journal of Agricultural and Resource Economics最新文献

Livestock productivity and profitability are threatened by livestock diseases. In this study, we examine farmers' revealed preferences for testing and treating gastrointestinal parasites in sheep in Sweden, taking into account the sequential structure of these decisions. We control for preventive measures, as well as the potential impact of wildlife–livestock disease transmission on farmers' decisions. A zero-inflated ordered probit model is used to estimate the determinants of farmers' decisions, and we cross-validate the robustness of the results to alternative model assumptions. Results from the regressions are used to calculate the consequences of these choices for farmers' profits. The results show that treatment decisions are informed by faecal testing, while both testing and treatment are influenced by the grazing practices, the size of the operation and access to information. Contrary to expectations from the conceptual framework, preventive management practices are positively correlated with treatment. Farmers take multiple risk factors into account when deciding on testing, but we do not find that the same factors affect the outcome of treatment. The economic impacts are small and suggest that treatment without prior testing is more profitable for the farmer than informed treatment. If widespread treatment increases drug resistance, this could motivate policies that encourage testing.

In groundwater-constrained areas, reallocating groundwater away from agriculture to achieve environmental outcomes has become a popular top-down regulatory approach. However, little attention has been paid to understanding public preferences for such policies. Using a choice experiment, we explore community preferences for different components of a groundwater allocation management program affecting agriculture in a severely water-constrained but highly groundwater-dependent environment, Western Australia. We find strong community preferences for a substantial reallocation away from agriculture, with compensation based on ecological benefits, regular monitoring through meters and a medium-level penalty for those that over-extract. The estimated non-market value to implement a groundwater management program comprising the preferred structure is up to AU$61 million per year. This result demonstrates the value of considering community preferences when designing groundwater management policies.

Natural wetlands in urbanised areas provide practical services, including flood control and amenity values such as views, wildlife habitat and recreational opportunities. But cities also construct wetlands to improve flood control and ecosystem services, the value of which might change property prices. This paper reports analyses of property prices that provide estimates of wetlands' localised amenity values in Auckland, New Zealand's largest city. A major challenge is that the selection of sites for wetlands’ construction is not random; amenity value is potentially confounded by property and neighbourhood characteristics that vary across space and over time. We use a combination of repeat-sales models, difference-in-differences and matching models to control for unobserved heterogeneity in property and neighbourhood characteristics. The results indicate that local benefit from constructed wetlands ranges from about 5% to 9% depending on the location of the property in areas adjacent to the wetlands or in a larger catchment of interest. Our results have a causal interpretation if the selection criteria are applied uniformly across Auckland and are valuable in assessing the benefits of constructed wetlands.

Given that income disparity is expanding and diet-related environmental footprints are increasing in urban China, this study aims to investigate the heterogeneity in these footprints across various income classes and examine the effect of income distribution on the total environmental footprints. Based on the quadratic almost ideal demand system model and taking into consideration the problems of endogeneity of food expenditure and zero expenditure, we estimate the income elasticities for 10 food categories across seven income classes and project the diet-related environmental footprints under seven scenarios for various strategies of the income distribution. The results show that per capita diet-related environmental footprints are greater for higher income classes than for lower income classes, as the former consume more animal-based food. Compared with high-income classes, income growth favouring low-income classes results in a rather significant increase in diet-related environmental footprints. With further economic growth, the lowest income group makes the greatest contribution to the increase in diet-related environmental footprints. Thus, policymakers should promote a more sustainable diet on the road to alleviating income inequality to ensure sustainable environmental development.

Stable agricultural production has been substantially challenged by increasingly frequent calamitous weather conditions. For winter wheat, continuous precipitation during the harvest season is particularly detrimental. This study utilises a county-level panel dataset of agricultural production in China for the period of 1998–2016 to evaluate the impact of continuous precipitation on the downside risk of winter wheat yield. Results show that continuous precipitation during the harvest season remarkably increases the downside risk of winter wheat yield. At the same time, the progressive adoption of harvest machinery in recent decades has effectively mitigated the downside risk of winter wheat yield driven by continuous precipitation. The mitigation effects of harvest mechanisation are more pronounced for plain areas with better-developed transportation infrastructure.

This study uses a multicountry, dynamic, quarterly CGE model, GlobeTERM, to estimate the economic impacts of a hypothetical foot and mouth disease outbreak in Australia. The national welfare losses arising from the outbreak depend mostly on the duration of trade sanctions by importers of Australian animal products. If an outbreak is contained within several months, and trade sanctions are dropped within a year of the outbreak, the net present value of Australia's welfare losses may be around AUS$10 billion. If all importers restore Australian access within a year, other than China–Hong Kong, which delays by 5 years, welfare losses are around AUS$21 billion. In a less likely scenario, in which trade sanctions persist in all trading partners for 5 years after the disease has been eradicated, contrary to international guidelines, welfare losses may exceed AUS$85 billion. Trading partners also suffer welfare losses due to trade sanctions. These losses are large enough to imply, from a global perspective, that a shift towards vaccinate-to-live policies combined with global efforts to eradicate the disease may be cost-effective.

We assess the responsiveness of market equilibrium agricultural output, price and land use to shocks in agricultural demand, land yield and arable land area and the role of road infrastructure policy in offsetting them. We adapt a partial equilibrium model in the agricultural composite good and lands markets to guide the specification and estimation of a simultaneous equation model (SEM) for agricultural demand, land yield and acreage, and calculate market equilibrium responsiveness. We estimate the SEM by the generalised method of moments three-stage least squares (GMM 3SLS) using a panel data set of the 10 biggest agricultural producer states in Brazil from 2001 to 2017. Using demand, land yield and acreage price elasticity estimates, we find that Brazil may expand equilibrium agricultural output while preserving its native vegetation land and dampening long-term agricultural price escalation under a scenario of increasing worldwide demand for food, fibre and fuel and adverse climate shocks. Using acreage and land yield freight rate elasticity estimates, we show how shocks may be offset by road infrastructure policies that reduce freight rates to specific destination states, as they may be designed to induce less equilibrium land use for the same equilibrium output or raise equilibrium output with less equilibrium land use.

Farming and natural resource extraction are the main livelihood strategies of the rural poor in developing countries. A better understanding of their relationship is needed to alleviate existing pressures on resources and to reduce poverty. To date, mainly monetary indicators have been used to measure environmental resource dependence. However, these are inadequate for poor people who consume rather than sell their environmental products. Therefore, we propose the Environmental Resource Dependence Index (ERDI) to better capture the multidimensionality of dependence. We analyse the relationship between farming efficiency and environmental resource dependence using a simultaneous equations model (SEM) and panel data for 2013, 2016 and 2017 from three rural provinces in Central Vietnam. Time-variant farming efficiency is estimated using a stochastic frontier model (SFM) with true random effects and Mundlak's adjustment. Our results show that monetary measures underestimate the extent of dependency. Therefore, policymakers should be careful to correctly identify those who are dependent on the environment. In addition, the results suggest that improved farming efficiency reduces the dependence on environmental resources. At the same time, higher dependence does not have a significant effect on farming efficiency.

On 8 January 2021, China's first live-animal and live-delivery futures product—in live hogs—was listed on the Dalian Commodity Exchange to serve as a risk management tool. We examine whether this newly established market exhibits good market quality and has realised its primary functions of price discovery and hedging. Our results suggest that the live hog futures market performs its price discovery function well and can hedge between 4% and 27% of the risk in the spot market, even though it is less actively traded, less liquid and more volatile than egg futures markets. To strengthen the hedging function of the live hog futures market, more effort—such as recruiting market makers and introducing night trading sessions—should be exerted to increase and smooth trading and stabilise volatility.