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"Rolfe, John"
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Distance Decay Functions for Iconic Assets: Assessing National Values to Protect the Health of the Great Barrier Reef in Australia
The aim of this study was to estimate the values to protect the health of the Great Barrier Reef (GBR) at the national level and to examine the effects of distance decay on valuation estimates. Two choice-modelling experiments were conducted in six locations: a regional town within the GBR catchment area (Townsville); Brisbane, the state capital approximately 450 km from the southern limit of the GBR; and four other capital cities (Sydney, Melbourne, Adelaide and Perth) ranging from nearly 1,000 km to over 4,000 km from Brisbane. Value estimates from a pooled model suggest that the average WTP across Australian households is $21.68 per household per annum for 5 years, and that those values are higher for respondents with higher levels of education and income, respondents who live in Queensland, respondents who live further away, and respondents who plan to visit more often in the future. For this nationally important iconic asset, apparent distance decay effects appear to be explained by variations in future usage and state responsibility, rather than proximity.
Journal Article
Horticulture producer’s willingness to participate in contract-based supply chain coordination: A case study from Queensland (Australia)
Product export provides an option for horticulture producers in Queensland (Australia) to diversify their market and increase returns from production. Vertical supply chain coordination in the form of contract-based marketing agreements between producers and export agents/distributors could facilitate increased export. The aim of this study was to investigate the willingness of horticulture producers to participate in export focused contract-based marketing agreements. To achieve this aim, a survey including a discrete choice experiment was conducted. The results from a mixed logit model and a latent class model suggest that there are three clusters of producers: a) the export interested, b) the likely risk averse, and c) those well established in the domestic markets. Only producers in group a) expressed a preference for contract-based export marketing agreements. These producers appear to be younger, already have some export experience, and have a relatively high level of collaboration in their product supply chains. Producers in groups b) and c) expressed an interest in stronger coordination within the domestic retail sector, potentially in the form of contract farming. Prices of produce and potential higher production costs are determinants identified by all producer groups as important for their decision-making about changes to their supply chain.
Journal Article
Increasing environmental outcomes with conservation tenders: The participation challenge
Incentive payments to landholders have become increasingly popular as mechanisms to achieve conservation goals. Within these mechanisms economists commonly recommend competitive tenders over fixed rate payment schemes because (a) specialist knowledge of landholders about their own enterprises and costs can be utilized, (b) auction prices are more likely to reflect the marginal value of the resources being used to produce the environmental outcome, and (c) the scope for rent seeking is reduced by competition between landholders. Yet there is very little uptake of conservation tenders as agrienvironmental schemes, potentially because of the difficulties in generating sufficient levels of landholder participation to make tenders effective. In this paper we summarize the efficiency benefits of using competitive tenders, analyze reasons why participation rates may be so low, and suggest potential mechanisms to address this.
Journal Article
Developing a population wide cost estimating framework and methods for technological intervention enabling ageing in place: An Australian case
Ageing in place is one of the greatest desires of elderly people. Assistive digital technologies could potentially delay the institutionalization of the elderly people and allow them ageing in place. This study develops a population-wide cost estimating framework for adopting digital technologies that can improve the quality of life of elderly people through examining an Australian region.
We developed a five-stage cost estimation framework, which involved progressive forecasting of elderly population and direct cost estimation methods. The forecasting and cost estimation models have been set for a 10-year period because the prediction accuracy from cross-sectional data is better in the short to medium term compared to the long-term. For cost estimation, we categorised the ageing population on the basis of the number of chronic diseases that they have contracted. Costs of assistive technologies were collected from open sources. The model has been tested in the Fitzroy and Central West, a regional area of Queensland in Australia. A stakeholder panel discussion in a workshop format was used to validate the appropriateness of the proposed framework and the study findings.
This study identified eight common chronic diseases with different comorbidity patterns in Australia. We also identified the required assistive technologies to assist patients with chronic diseases. This study estimated that annual per capita cost for technological intervention could range from AUD 4,169 to AUD 7,551 on the basis of different price margins of the technologies.
The approach of categorising the aged cohorts on the basis of the number of chronic diseases helps estimate population-wide costs compared to using single technology intervention costs for a particular chronic disease cohort. The cost estimation framework and the method developed in this study can assist the government to estimate costs for ageing-in-place programs.
Journal Article
Choice Certainty and Consistency in Repeated Choice Experiments
The main objective of this study is to examine how repeated choice affects preference learning in stated preference experiments. We test different hypotheses related to preference learning by analyzing response patterns and asking respondents in a choice experiment to report their experienced certainty when going through the choice tasks. In a split-sample test, we show that follow-up choice certainty questions are procedural invariant. The self-reported certainty results indicate that learning occurs, but econometric testing procedures do not identify any significant impact of learning effects on parameter estimates or variance across choice tasks. Additional tests of choice consistency suggest that preferences in the choice experiment are stable and coherent.
Journal Article