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).
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.).