Which government entity first established a dedicated 'Nudge Unit' (officially called the Behavioural Insights Team) to apply consumer psychology principles to public policy?

The intersection of consumer psychology and government policy has shaped how nations influence citizen behavior without restricting freedom of choice. 'Nudge theory' has become increasingly popular in policy design worldwide, using psychological insights to encourage beneficial decisions. Test your knowledge about this fascinating application of behavioral economics in government strategy!

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The United States Office of Information and Regulatory Affairs under President Obama
The United Kingdom Cabinet Office under Prime Minister David Cameron
The Australian Department of Finance under Prime Minister Julia Gillard
The German Federal Chancellery under Chancellor Angela Merkel