While avoiding the illusion that those concerned are perfectly informed, it is reasonable to assume that their actions will take account of the constraints imposed by implicit thresholds. Thus regional parties will only present candidates in their region, or even in favourable constituencies within that region where they will concentrate their manpower and financial resources. Similarly, small ideological parties will focus on what in theory is favourable ground for them. If the system allows, this can lead to alliances between parties, whereby, for example, one will not stand in a particular constituency in exchange for another party including one of its candidates on its list, there or elsewhere. To ensure that explicit or implicit thresholds are not too easily thwarted some electoral laws specify higher thresholds for alliances than for individual parties, but this is rare.