State capacity

State capacity is the ability of a state to implement policy: to raise revenue, administer, regulate, enforce contracts, provide public goods and hold a monopoly of legitimate force. It is different from regime type, which concerns who rules and how they are chosen, and from the quality of policy. A highly capable state can be a democracy (Denmark) or an autocracy (Singapore, China in many domains); weak states can also be either.

Michael Mann (1984) distinguished despotic power, the range of actions elites can take without negotiating with society, from infrastructural power, the capacity to penetrate society and implement decisions. Strong modern states, including democracies, have little despotic but great infrastructural power. Timothy Besley and Torsten Persson model fiscal and legal capacity as investments that rulers make when they expect to benefit, and find that common-interest public goods such as fighting external wars, political stability and inclusive institutions favour building capacity, echoing the bellicist theory of state formation. Barbara Geddes's Politician's Dilemma (1994) explained why politicians often prefer patronage to merit-based bureaucracies. Jonathan Hanson and Rachel Sigman measure capacity along extractive, coercive and administrative dimensions, and Francis Fukuyama argued that the quality of government needs measures separate from democracy.

Dan Slater (2010) argued that in Southeast Asia, states became strong and dictatorships durable where elites faced threatening contentious politics and formed 'protection pacts' backing a strong state, as in Malaysia and Singapore. For democracies, Andersen, Knutsen and Skaaning find that administrative capacity, such as meritocratic recruitment and impartial administration, reduces the risk of incumbent-led democratic breakdowns, while coercive capacity does not.

• Singapore: a highly capable, low-corruption civil service under a dominant party.
• China: strong capacity to build infrastructure and mobilise, uneven capacity to enforce environmental and food-safety rules.
• Estonia's digital state, which built administrative capacity through e-government after 1991.
• Fragile states such as Somalia or South Sudan, where no authority implements decisions nationwide.

Capacity is hard to measure without circularity, since outcomes such as tax revenue are partly policy choices. High coercive capacity can serve repression as easily as public goods, and 'capacity' is sometimes invoked to excuse authoritarian rule. Scholars also debate whether capacity should come before democracy ('stateness first') or whether democracy builds capacity.

State capacity is now one of the most studied variables in comparative politics and development. It helps explain why some autocracies deliver public goods and others do not, and why some democracies are more resilient than others.