1) Select a limited number (1 - 5) of the products (and their varieties / types) that you want to ask consumers about (for example in the case of agriculture, certain varieties of tomatoes and cucumbers). These should, preferably, be products that people are at least vaguely familiar with, so that they are able to say whether they prefer them or not.
2) If you enquire about more than one product, define how many products people have to prefer in order to be labeled as ‘preferring local products’ (for example, at least 2 out of 3 products).
3) Define who the target consumers are (for example, adults who visit local vegetable markets or customers of local supermarkets).
4) Conduct individual interviews with a representative sample of the target group consumers (e.g. people visiting local vegetable markets), asking them whether they usually prefer to buy the local or an imported variety of a given product. Before asking this question, remind them about the usual price of each type of product and if possible, show them average-looking examples of both ‘competing’ products.
5) To calculate the indicator's value, divide the number of respondents who usually prefer to buy locally produced products by the total number of respondents (exclude those who did not know or could not decide). Multiply the result by 100 to convert it to a percentage.