Fiscal policy in the context of Optimal control

The Athenian coup of 411 BC was the result of a revolution that took place during the Peloponnesian War between Athens and Sparta. The coup overthrew the democratic government of ancient Athens and replaced it with a short-lived oligarchy known as the Four Hundred.

In the wake of the financial crisis caused by the failed Sicilian Expedition of the Athenian military in 413 BC, some high-status Athenian men, who had disliked the broad-based democracy of the city-state for a long time, sought to establish an oligarchy of the elite. They believed that they could manage foreign, fiscal, and war policies better than the existing government.

In economics, inflation is an increase in the average price of goods and services in terms of money. This increase is measured using a price index, typically a consumer price index (CPI). When the general price level rises, each unit of currency buys fewer goods and services; consequently, inflation corresponds to a reduction in the purchasing power of money. The opposite of CPI inflation is deflation, a decrease in the general price level of goods and services. The common measure of inflation is the inflation rate, the annualized percentage change in a general price index.

Changes in inflation are widely attributed to fluctuations in real demand for goods and services (also known as demand shocks, including changes in fiscal or monetary policy), changes in available supplies such as during energy crises (also known as supply shocks), or changes in inflation expectations, which may be self-fulfilling. Moderate inflation affects economies in both positive and negative ways. The negative effects would include an increase in the opportunity cost of holding money; uncertainty over future inflation, which may discourage investment and savings; and, if inflation were rapid enough, shortages of goods as consumers begin hoarding out of concern that prices will increase in the future. Positive effects include reducing unemployment due to nominal wage rigidity, allowing the central bank greater freedom in carrying out monetary policy, encouraging loans and investment instead of money hoarding, and avoiding the inefficiencies associated with deflation.

Government spending or expenditure includes all government consumption, investment, and transfer payments. In national income accounting, the acquisition by governments of goods and services for current use, to directly satisfy the individual or collective needs of the community, is classed as government final consumption expenditure. Government acquisition of goods and services intended to create future benefits, such as infrastructure investment or research spending, is classed as government investment (government gross capital formation). These two types of government spending, on final consumption and on gross capital formation, together constitute one of the major components of gross domestic product.

Spending by a government that issues its own currency is nominally self-financing. However, under a full employment assumption, to acquire resources produced by its population without potential inflationary pressures, removal of purchasing power must occur via government borrowing, taxes, custom duties, the sale or lease of natural resources, and various fees like national park entry fees or licensing fees. When these sovereign governments choose to temporarily remove spent money by issuing securities in its place, they pay interest on the money borrowed. Changes in government spending are a major component of fiscal policy used to stabilize the macroeconomic business cycle.

John Maynard Keynes, 1st Baron Keynes CB, FBA (/keɪnz/ KAYNZ; 5 June 1883 – 21 April 1946), was an English economist whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments. Originally trained in mathematics, he built on and greatly refined earlier work on the causes of business cycles. One of the most influential economists of the 20th century, he produced writings that are the basis for the school of thought known as Keynesian economics, and its various offshoots. His ideas, reformulated as New Keynesianism, are fundamental to mainstream macroeconomics. He is known as the "father of macroeconomics".

Keynes was educated at King's College at the University of Cambridge, where he graduated in 1904 with a B.A. in mathematics. During the Great Depression of the 1930s, Keynes spearheaded a revolution in economic thinking, challenging the ideas of neoclassical economics that held that free markets would, in the short to medium term, automatically provide full employment, as long as workers were flexible in their wage demands. He argued that aggregate demand (total spending in the economy) determined the overall level of economic activity, and that inadequate aggregate demand could lead to prolonged periods of high unemployment, and since wages and labour costs are rigid downwards the economy will not automatically rebound to full employment. Keynes advocated the use of fiscal and monetary policies to mitigate the adverse effects of economic recessions and depressions. After the 1929 crisis, Keynes also turned away from a fundamental pillar of neoclassical economics: free trade. He criticized Ricardian comparative advantage theory (the foundation of free trade), considering the theory's initial assumptions unrealistic, and became definitively protectionist. He detailed these ideas in his magnum opus, The General Theory of Employment, Interest and Money, published in early 1936. By the late 1930s, leading Western economies had begun adopting Keynes's policy recommendations. Almost all capitalist governments had done so by the end of the two decades following Keynes's death in 1946. As a leader of the British delegation, Keynes participated in the design of the international economic institutions established after the end of World War II but was overruled by the American delegation on several aspects.

The economy of governments covers the systems for setting levels of taxation, government budgets, the money supply and interest rates as well as the labour market, national ownership, and many other areas of government interventions into the economy.

Most factors of economic policy can be divided into either fiscal policy, which deals with government actions regarding taxation and spending, or monetary policy, which deals with central banking actions regarding the money supply and interest rates.

A ministry of finance is a ministry or other government agency in charge of government finance, fiscal policy, and financial regulation. It is headed by a finance minister, an executive or cabinet position .

A ministry of finance's portfolio has a large variety of names around the world, such as "treasury", "finance", "financial affairs", "economy" or "economic affairs". The position of the finance minister might be named for this portfolio, but it may also have some other name, like "Treasurer" or, in the United Kingdom, "Chancellor of the Exchequer".

Keynesian economics (/ˈkeɪnziən/ KAYN-zee-ən; sometimes Keynesianism, named after British economist John Maynard Keynes) are the various macroeconomic theories and models of how aggregate demand (total spending in the economy) strongly influences economic output and inflation. In the Keynesian view, aggregate demand does not necessarily equal the productive capacity of the economy. It is influenced by a host of factors that sometimes behave erratically and impact production, employment, and inflation.

Keynesian economists generally argue that aggregate demand is volatile and unstable and that, consequently, a market economy often experiences inefficient macroeconomic outcomes, including recessions when demand is too low and inflation when demand is too high. Further, they argue that these economic fluctuations can be mitigated by economic policy responses coordinated between a government and their central bank. In particular, fiscal policy actions taken by the government and monetary policy actions taken by the central bank, can help stabilize economic output, inflation, and unemployment over the business cycle. Keynesian economists generally advocate a regulated market economy – predominantly private sector, but with an active role for government intervention during recessions and depressions.

In France under the Ancien Régime, the Estates General (French: États généraux [eta ʒeneʁo] ) or States-General was a legislative and consultative assembly of the different classes (or estates) of French subjects. It had a separate assembly for each of the three estates (clergy, nobility and commoners), which were called and dismissed by the king. It had no true power in its own right as, unlike the English Parliament, it was not required to approve royal taxation or legislation. It served as an advisory body to the king, primarily by presenting petitions from the various estates and consulting on fiscal policy.

The Estates General first met in 1302 and 1303 in relation to King Philip IV's conflict with the papacy. They met intermittently until 1614 and only once afterward, in 1789, but were not definitively dissolved until after the French Revolution. The Estates General were distinct from the parlements (the most powerful of which was the Parlement of Paris), which started as appellate courts but later used their powers to decide whether to publish laws to claim a legislative role.

Government revenue or national revenue is money received by a government from taxes and non-tax sources to enable it, assuming full resource employment, to undertake non-inflationary public expenditure. Government revenue as well as government spending are components of the government budget and important tools of the government's fiscal policy. The collection of revenue is the most basic task of a government, as the resources released via the collection of revenue are necessary for the operation of government, provision of the common good (through the social contract in order to fulfill the public interest) and enforcement of its laws; this necessity of revenue was a major factor in the development of the modern bureaucratic state.

Government revenue is distinct from government debt and money creation, which both serve as temporary measures of increasing a government's money supply without increasing its revenue.

Economic liberalism is a political and economic ideology that supports a market economy based on individualism and private property in the means of production. Adam Smith is considered one of the primary initial writers on economic liberalism, and his writing is generally regarded as representing the economic expression of 19th-century liberalism up until the Great Depression and rise of Keynesianism in the 20th century. Historically, economic liberalism arose in response to feudalism and mercantilism.

Economic liberalism is associated with markets and private ownership of capital assets. Economic liberals tend to oppose government intervention and protectionism in the market economy when it inhibits free trade and competition, but tend to support government intervention where it protects property rights, opens new markets or funds market growth, and resolves market failures. They also tend to oppose cartels, monopolies, financialization of the economy, rent-seeking behaviour and unproductive classes reliant on rent, assets or state-granted privileges. An economy that is managed according to these precepts may be described as a liberal economy or operating under liberal capitalism. Economic liberals commonly adhere to a political and economic philosophy that advocates a restrained fiscal policy and a balanced budget through measures such as low taxes, reduced government spending, and minimized government debt. Free trade, deregulation, tax cuts, privatization, labour market flexibility, and opposition to trade unions are also common positions.

A tax cut (or tax rate cut) is typically seen as leading to a decrease in the amount of money taken from taxpayers, thus increasing the disposable income of taxpayers but decreasing government revenue. It usually refers to reductions in the percentage of tax paid on income, goods and services.Tax cuts also include reduction in tax in other ways, such as tax credits, deductions, and loopholes.As they leave consumers with more disposable income, tax cuts are an example of an expansionary fiscal policy.

How a tax cut affects the economy depends on which tax is cut. Policies that increase disposable income for lower- and middle-income households are more likely to increase overall consumption and "hence stimulate the economy". Tax cuts in isolation boost the economy because they increase government borrowing. However, they are often accompanied by spending cuts or changes in monetary policy that can offset their stimulative effects.

In American political theory, fiscal conservatism or economic conservatism is a political and economic philosophy regarding fiscal policy and fiscal responsibility with an ideological basis in capitalism, individualism, limited government, and laissez-faire economics. Fiscal conservatives advocate tax cuts, reduced government spending, free markets, deregulation, privatization, free trade, and minimal government debt. Fiscal conservatism follows the same philosophical outlook as classical liberalism. This concept is derived from economic liberalism and later neoliberalism.

The term has its origins in the era of the American New Deal during the 1930s as a result of the policies initiated by modern liberals, when many classical liberals started calling themselves conservatives as they did not wish to be identified with what was being called liberalism in the United States. In the United States, the term liberalism has become associated with the welfare state and expanded regulatory policies created as a result of the New Deal and its offshoots from the 1930s onwards.

Keynesian economics (/ˈkeɪnziən/ KAYN-zee-ən; sometimes Keynesianism, named after British economist John Maynard Keynes are the various macroeconomic theories and models of how aggregate demand (total spending in the economy) strongly influences economic output and inflation. In the Keynesian view, aggregate demand does not necessarily equal the productive capacity of the economy. It is influenced by a host of factors that sometimes behave erratically and impact production, employment, and inflation.

Keynesian economists generally argue that aggregate demand is volatile and unstable and that, consequently, a market economy often experiences inefficient macroeconomic outcomes, including recessions when demand is too low and inflation when demand is too high. Further, they argue that these economic fluctuations can be mitigated by economic policy responses coordinated between a government and their central bank. In particular, fiscal policy actions taken by the government and monetary policy actions taken by the central bank, can help stabilize economic output, inflation, and unemployment over the business cycle. Keynesian economists generally advocate a regulated market economy – predominantly private sector, but with an active role for government intervention during recessions and depressions.