Investigate how scientific evidence has shaped public policy in Australia, using case studies such as plain packaging, COVID-19 response, gun control or seatbelt laws

What this dot point is asking

NESA wants you to use named Australian case studies to evaluate how scientific evidence has shaped public policy, identifying the evidence, the policy and the outcome. This dot point is examined in 5 to 9 mark questions every year.

The answer

Australian public policy increasingly draws on scientific evidence, often through expert advisory bodies. Some case studies represent strong applications of evidence-based policymaking; others illustrate the gap between evidence and politics.

Case study 1: Tobacco plain packaging (2012)

Background. Smoking has been confirmed since the 1950s as a cause of lung cancer, cardiovascular disease, COPD and many other conditions. By 2010 tobacco was killing 15,000 Australians per year.

The evidence.

• Doll and Hill's 1950s and 1960s cohort studies established causation.
• Industry documents (released in the 1998 US Master Settlement Agreement) showed deliberate targeting of young smokers.
• Cancer Council research showed plain packaging reduced appeal, increased noticeable warnings and undermined brand differentiation.

The policy. The Tobacco Plain Packaging Act 2011 came into force 1 December 2012. Cigarette packs must be standard olive-brown with large graphic health warnings. Brand names appear in small, identical typeface. Other restrictions include advertising bans, point-of-sale restrictions, and progressively higher tobacco excise.

The outcomes.

• Adult daily smoking fell from 16 per cent (2012) to 11 per cent (2019).
• Daily smoking among 12 to 17 year olds fell from 6.7 per cent (2011) to 1.9 per cent (2017).
• Tobacco companies (Philip Morris, JTI) sued Australia under investor-state arbitration provisions. Australia won.
• World Trade Organization confirmed plain packaging is consistent with international trade obligations (2018).
• Over 20 countries have since adopted plain packaging.

Evaluation. A textbook case of evidence shaping policy that delivered population-health benefits.

Case study 2: COVID-19 response (2020 onwards)

The evidence.

• Epidemiological modelling from the Doherty Institute, University of Melbourne and the Kirby Institute.
• Genomic surveillance by NSW Health Pathology and Doherty Institute identified variants.
• Clinical trial evidence from RECOVERY (UK), SOLIDARITY (WHO), Australia's ASCOT trial.
• Real-world vaccine effectiveness from the Australian Immunisation Register and AusVaxSafety.

The policy responses.

• 2020. National Cabinet established. International border closures. Hotel quarantine. State lockdowns and mask mandates.
• 2021. Vaccine rollout. Initial focus on healthcare workers and elderly.
• 2022. Pivot from elimination to high-vaccination reopening, informed by Doherty Institute modelling.
• 2023 to 2025. Vaccine boosters, treatments for high-risk groups, sustained surveillance.

Outcomes.

• Approximately 31,000 cumulative COVID-19 deaths in Australia through 2024.
• Per capita death rate around half of comparable English-speaking countries.
• Vaccine uptake reached over 95 per cent of adults double-dosed.
• Economic recovery faster than many comparable nations in 2021 to 2022.

Strengths.

• Modelling published and cited in policy decisions.
• Transparency through state dashboards.
• Vaccine procurement strategy adjusted in response to delivery problems.
• Sustained collaboration between Commonwealth and states.

Weaknesses.

• Initial vaccine rollout slower than planned.
• Inconsistent messaging between states.
• Some policies lagged available evidence (e.g. mask mandates).
• Modelling uncertainty was sometimes obscured in communication.

Case study 3: National Firearms Agreement (1996)

Background. The Port Arthur massacre, 28 to 29 April 1996, killed 35 people and injured 23. The shooter used semi-automatic rifles legally purchased.

The evidence.

• International evidence (especially from the US and UK) on the role of semi-automatic weapons in mass shootings.
• Australian data showing firearms suicides and homicides.
• Public health framing developed by Australian researchers (Simon Chapman, others).

The policy. National Firearms Agreement (signed by all states and territories within 12 days). Banned semi-automatic and pump-action long guns and provided a national gun buyback (over 643,000 firearms surrendered).

The outcomes.

• No fatal mass shootings (5 or more deaths) in Australia for over 22 years following the agreement (until specific Australian context).
• Firearm suicide rate fell from 2.5 to 0.8 per 100,000 between 1995 and 2006.
• Firearm homicide rate fell substantially.
• Studies in Injury Prevention (2006), American Law and Economics Review (2010) and JAMA (2016) attribute substantial portions of the decline to the policy.

Evaluation. A rapid policy response to an evidence-supported intervention, sustained politically despite some opposition.

Case study 4: Seatbelt laws (1970 onwards)

Background

Road crashes were a leading cause of death in Australia in the 1960s.

The evidence

Multiple studies showed seatbelts reduced fatality risk by 40 to 50 per cent in serious crashes.

The policy

Victoria became the first jurisdiction in the world to mandate seatbelt wearing in 1970. All other Australian states followed by 1972.

The outcomes

• Road deaths per capita fell substantially.
• Seatbelt compliance reached over 90 per cent within years.
• Australian leadership inspired international adoption (UK 1983, US states 1984 onwards).
• The model has been replicated in helmet laws (bicycle 1990 onwards) and child restraint laws.

Case study 5: HPV vaccine and National Immunisation Program (2007)

See the Module 6 dot point HPV vaccine and Ian Frazer.

The 2007 decision to provide free HPV vaccination was an example of evidence rapidly translated into policy:

• The science was published in 1991 (the VLP).
• Clinical trials reported by 2002 to 2006.
• Federal funding decision made within months of FDA approval.
• Result: world-first elimination trajectory for cervical cancer.

When evidence is not enough

Several Australian policy areas illustrate that scientific evidence is necessary but not sufficient.

Climate policy

Despite IPCC consensus, Australian climate policy has been politically contested for two decades. The carbon pricing scheme (2012 to 2014) and the Safeguard Mechanism reforms (2023) illustrate that evidence interacts with politics.

Drug policy

Decriminalisation of cannabis and other drugs has been debated despite evidence on harm reduction. Australia's Capital Territory introduced cannabis decriminalisation; other jurisdictions have not.

Mental health

Evidence on early intervention has been substantial, but implementation has been uneven across states.

The science-policy interface

Effective evidence-based policy depends on:

1. Strong evidence base. Robust, peer-reviewed research.
2. Synthesis and translation. Expert bodies (NHMRC, CSIRO, Productivity Commission) translate research for policymakers.
3. Political will. Policymakers willing to act on evidence.
4. Public communication. Building social support.
5. Monitoring. Outcomes evaluated to refine the policy.

Failure at any step can prevent evidence from translating into policy.