I nogle produkt, bygge- og anlægs- samt servicesektorer kan virkningen være særlig betydelig, idet offentlige indkøbere tegner sig for en stor del af markedet (inden for computere, energieffektive bygninger, offentlig transport osv.).
In some product, works and service sectors, the impact can be particularly significant, as public purchasers command a large share of the market (in computers, energy-efficient buildings, public transport, and so on).