Behavioural science consulting

We change behaviour.

We help PROs, public authorities and companies
to turn insights & policy into behaviour change.

Let’s talk Our approach

Trusted by

  • Recupel
  • Ecologic
  • WEEE Forum
  • Ville de Paris
  • ADEME
  • Alcome
  • DASTRI
  • Métropole Européenne de Lille
  • SNCF
  • CEA
  • Aéroport Toulouse-Blagnac
  • Orange Bank

Environment

Circular policies only work if people take part.

Collection targets, sorting rules, reuse schemes: extended producer responsibility depends on millions of individual decisions. We measure what drives them, then design the communication and the policies that change them.

Dimitri Naczaj speaking on stage, next to a slide that reads: if persuasion was enough, climate crisis would be solved already.
Dimitri Naczaj on stage at the E-Waste World Conference.

  • Extended producer responsibility

    We support PROs and public authorities with behavioural diagnostics, campaign design and policy evaluation, from awareness to collection rates.

  • E-waste

    Why do old phones sleep in drawers? We identify the barriers to returning devices and test the levers that bring them back into collection and reuse.

  • Circular economy & waste

    Sorting, reuse, repair, litter prevention: we design interventions grounded in behavioural science and measure their real impact.

What we work on

  • Device return
  • Sorting & recycling
  • Reuse & repair
  • Public campaigns
  • Policy evaluation

Our approach

Science first.
Then action.

Every project follows the same scientific path, whether it is a national collection campaign or a local pilot.

  1. We target.

    We define the behaviour that matters, who performs it and in which context. A precise target is half the change.

  2. We analyse.

    Surveys, field studies and experiments: we measure barriers and levers with validated scientific methodology.

  3. We change behaviour.

    We design and test interventions, from messaging to policy, and quantify their impact on real behaviour.

Bellegarde in numbers

Across all our work in behavioural science.

  • 14 years of expertise in behavioural science
  • 150+ interventions designed and tested with our clients
  • 90+ scientific papers and book chapters
  • 80+ collaborations with companies, institutions and universities

The team

The scientists behind the science.

Researchers who publish, teach and apply behavioural science, with field expertise in EPR and the circular economy, environment, and societal problematics.

  • Dimitri Naczaj, PhD

    Co-founder, head of EPR & circularity research

  • Éric Bonetto, PhD

    Co-founder, head of behavioural science

  • Jaïs Adam-Troïan, PhD

    Co-founder, head of intelligence and defense issues

  • Robin Ronceray

    EPR & circular economy expert

FAQ

Questions? Answers.

Something else in mind? Write to us at hello@bellegarde.co

What is scientific consulting?

Consulting built on solid scientific methods. Our recommendations come from the latest research and from data we collect, not from intuition.

Does behavioural science really work?

Yes, when it is applied rigorously. We test interventions and measure their effect on actual behaviour, not just on intentions.

Do you do nudges?

Yes, but not only. Nudges adjust the environment to shift a behaviour in the moment. We also work on the motivations, norms and policies that make change last.

Do you work with producer responsibility organisations?

Yes. We work with PROs and the organisations around them to understand their audiences, design campaigns and evaluate schemes, for e-waste and beyond.

Not sure which behaviour you want to change?

Get in touch. If there is a behaviour, we can help you define it, and change it.

Contact

Let’s change behaviour, together.

Tell us about your project, your targets or your questions. We will get back to you shortly.

hello@bellegarde.co