This paper empirically examines whether proscription of a habitual consumption item can act as a mechanism to develop anti-consumption behaviour and attitudes. The paper tracks a legislated retail ban on single-use polyethylene plastic bags, analysing 1167 interviews with shoppers before the ban's announcement, during a 4-month phasing-out period (and demarketing campaign), and when the ban was in full effect. Two hundred and fifty three interviews are repeated with the same individuals to allow identification of individual-level attitudinal and behavioural change. Anti-consumption is typically conceptualised as a phenomenon based on choice. This research investigates how shoppers react when forced into anti-consumption behaviour, and how supportive voluntary anti-consumers are of others being made to change. Grouping shoppers according to their level of voluntary anti-consumption of plastic bags before the ban, the analysis finds that shoppers who voluntarily showed anti-consumption behaviour were the only group showing any voluntary shift in anti-consumption behaviours during the phasing-out period. These shoppers are supportive of forcing others to show anti-consumption, while the level of behavioural and attitudinal resistance from shoppers that showed little or no voluntary anti-consumption is low. These findings support the use of proscription to achieve anti-consumption behaviours, however, proscription does not necessarily engender full anti-consumption attitudes. This study adds to knowledge on anti-consumption and shopper resistance to proscriptive interventions designed to reduce socially undesirable behaviours. It provides further evidence that demarketing campaigns, without accompanying negative reinforcers, may be insufficient to achieve widespread behavioural change alone.

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Objectives. To determine the number of people who inject drugs (PWID) in Canada and the annual coverage of opioid agonist treatment (OAT) and needle-and-syringe provision for PWID. Methods. We estimated the number of PWID in 11 of 13 Canadian provinces and territories in 2011 by using indirect multiplier methods based on provincial and territorial methadone recipient totals and proportion of surveyed PWID receiving methadone. We modeled annual increases for 2011 to 2016 on Quebec and British Columbia longitudinal data. We calculated needle-and-syringe coverage (World Health Organization [WHO] recommendation: ≥ 200 per PWID) and OAT coverage (WHO recommendation: ≥ 40 per 100 PWID) per province and territory annually. Results. An estimated 130 000 individuals in Canada (0.55%) injected drugs in 2011, increasing to 171 900 individuals (0.70%) in 2016. Needle-and-syringe coverage increased from 193 to 291 per PWID, and OAT coverage increased from 55 to 66 per 100 PWID over the study period. Conclusions. While the number of PWID increased between 2011 and 2016, OAT coverage remained high, and needle-and-syringe coverage generally improved over time. Public Health Implications. These data will inform public health surveillance, service planning, and resource allocation, and assist monitoring of treatment and harm-reduction coverage outcomes.

Food waste is a global problem. In Australia alone, it is estimated that households throw away AU$5.2 billion worth of food (AU$616 per household) each year. Developed countries have formal waste management systems that provide measures of food waste. However, much remains unknown about informal food waste disposal routes and volumes outside of the formal system. This article provides indicative metrics of informal food waste by identifying, in detail, five of the dominant informal food waste disposal routes used by Australian households: home composting, feeding scraps to pets, sewer disposal, giving to charity, and dumping or incineration. Informal waste generation rates are then calculated from three primary data sources, in addition to data from previous Australian and UK surveys, using a weighted average method in conjunction with a Monte-Carlo simulation. We find that the average Australian household disposes of 2.6 kgs of food waste per week through informal routes (1.7 kgs via household composting, 0.2 kgs via animals, and 0.6 kgs via sewage). This represents 20% of Australian household food waste flows. Our results highlight that informal food waste is a sizable food waste flow from Australian homes, deserving of greater research and government attention. Our examination of the full extent of food waste by disposal mode provides waste managers and policy makers with clear disposal routes to target for behaviour change and positive environmental outcomes.

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