How we measure our impact

Find out more about London & Partners’ economic impact and evaluation methodology.
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The additional economic impact of London & Partners is defined as the extra benefits generated as a direct result of our intervention, compared to what would have happened without our work.

Measurement of this additional economic value, "gross value added" (GVA), is calculated mainly by surveying a representative sample of our audiences. 

How is London & Partners' impact measured?

Gross value added (GVA)

  • GVA is the economic added value created when producing goods or providing services.
  • It is the difference between the price paid for a good or service and the cost of inputs used in its production. 
  • GVA measures profits and wages of London-based businesses and London’s employees. By measuring our impact on increasing GVA, we are reporting our economic contribution to London.

Performance indicators

  • Our key performance indicators for measuring the economic benefits to the city are gross value added (GVA) and jobs retained. 
  • Economic impact figures are expressed in terms of GVA (economic wealth), unless otherwise stated.
  • We also estimate additional leisure tourists, business delegates, major event-goers and additional sales made by London small and medium-sized enterprises (SMEs) that have been part of our programmes.

Jobs created and supported

  • By attracting foreign direct investment in key sectors for London, we generate new, high-value jobs for the London economy.
  • We also create new and safeguard existing jobs in London by attracting the spend of tourists, business delegates, major event spectators and students.
  • We cannot track these jobs directly but we use a robust model to estimate the number of jobs that our promotional activities support.

Evaluation methodology

The Evaluation Methodology 2018 report outlines the work undertaken by London & Partners and GLA Economics to evaluate impact across our five major business areas: leisure tourism, business tourism, major events, foreign direct investment and higher education.

Read the Evaluation Methodology 2021 [PDF 5.83 MB] report for full information about how we measure our impact.

The evaluation of our impact on the London economy captures only the additional benefits that happen as a result of our interventions. This is ensured by taking account of factors such as over-optimism and displacement.

Jakob Oddershede, Senior Economist, London & Partners