V praksi se stanje lahko pojasni z dodatnimi neposrednimi ali posrednimi stroški, nastalimi pri oblikovanju takih območij (kraje, višina zavarovalnih premij, vandalizem, itd.) ter s strukturnimi pomanjkljivostmi, ki so značilne za takšna območja (težave pri iskanju kvalificirane delovne sile, ki je pripravljena delati, vsesplošni upad gospodarskih dejavnosti, pomanjkanje in razpad javne infrastrukture, negotovost, finančne težave, s katerimi se srečuje lokalna oblast, problem "javne podobe" itd.).
This situation may be explained in practice by the additional direct or indirect costs involved in setting up in such areas (theft, level of insurance premiums, vandalism, etc.) and the structural handicaps that are a feature of such areas (difficulty in finding skilled labour that is prepared to work, overall reduction in economic activity, lack and decay of public infrastructure, insecurity, financial problems faced by local authorities, problem of 'public image`, etc.).