You asked

I am interested in understanding how agriculture’s contribution to Gross Domestic Product (output approach) (GDP(O)) is estimated. Please would you let me have any papers that describes the methodology on how the estimate for agriculture is produced.

We said

Thank you for your request,

Please find attached a link to the most recent Quality Assurance of Administrative data (QAAD) report relating to the Agriculture industry;

https://www.ons.gov.uk/economy/economicoutputandproductivity/output/methodologies/qualityassuranceofadministrativedatareportfortheagricultureindustryseptember2017

With regards to your question relating to how agriculture’s contribution to GDP is calculated, the following formula is used –

Growth in Agriculture index between period t and period t-1 x Agriculture weight within GDP(O) index at time t-1

Here we take the GDP(O) weight to be 100, so the agriculture weight is currently 0.66.