Fiscal federalism concept" that helps in designing financial relations between the national and subnational levels of the government, "fiscal decentralization on the other hand is a process of applying such principles". Federal and non-federal countries differ in the manner in which such principles are applied. Application differs because unitary and federal governments differ in their political and legislative context and thus provide different opportunities for fiscal decentralization. The concepts of fiscal federalism are related to vertical and horizontal fiscal relations. The notions related to horizontal fiscal relations are related to regional imbalances and horizontal competition. Similarly the notions related to fiscal relations
Fiscal capacity cannot improve fiscal capacity by simply raising taxes if it does not have a political, legal and fiscal history that has supported such state-power. In comparison to Besley and Persson's individual level study, Gordon and Li (2009) focus on the role of businesses and the financial sector in developed versus developing countries. They model businesses' participation in the financial sector—where Gordon and Li specifically refer to participation in the financial sector as using banks—as participation in the formal sector; they assume that tax authorities can monitor bank records, so that mass participation in the financial sector lends the state information