|Part of a series on|
In macroeconomics, investment is the amount of goods purchased or accumulated per unit time which are not consumed at the present time. The types of investment are residential investment in housing that will provide a flow of housing services over an extended time, non-residential fixed investment in things such as new machinery or factories, human capital investment in workforce education, and inventory investment (the accumulation, intentional or unintentional, of goods inventories).
Macroeconomics is a branch of economics dealing with the performance, structure, behavior, and decision-making of an economy as a whole. This includes regional, national, and global economies. Macroeconomists study aggregated indicators such as GDP, unemployment rates, national income, price indices, and the interrelations among the different sectors of the economy to better understand how the whole economy functions. They also develop models that explain the relationship between such factors as national income, output, consumption, unemployment, inflation, saving, investment, energy, international trade, and international finance.
Fixed investment in economics is the purchasing of newly produced fixed capital. It is measured as a flow variable – that is, as an amount per unit of time.
Human capital is the stock of habits, knowledge, social and personality attributes embodied in the ability to perform labour so as to produce economic value.
In measures of national income and output, "gross investment" (represented by the variable I ) is a component of gross domestic product (GDP), given in the formula GDP = C + I + G + NX, where C is consumption, G is government spending, and NX is net exports, given by the difference between the exports and imports, X − M. Thus investment is everything that remains of total expenditure after consumption, government spending, and net exports are subtracted (i.e. I = GDP − C − G − NX ).
A variety of measures of national income and output are used in economics to estimate total economic activity in a country or region, including gross domestic product (GDP), gross national product (GNP), net national income (NNI), and adjusted national income also called as NNI at factor cost. All are specially concerned with counting the total amount of goods and services produced within the economy and by different sectors. The boundary is usually defined by geography or citizenship, and it is also defined as the total income of the nation and also restrict the goods and services that are counted. For instance, some measures count only goods & services that are exchanged for money, excluding bartered goods, while other measures may attempt to include bartered goods by imputing monetary values to them.
In elementary mathematics, a variable is a symbol, commonly a single letter, that represents a number, called the value of the variable, which is either arbitrary, not fully specified, or unknown. Making algebraic computations with variables as if they were explicit numbers allows one to solve a range of problems in a single computation. A typical example is the quadratic formula, which allows one to solve every quadratic equation by simply substituting the numeric values of the coefficients of the given equation for the variables that represent them.
Gross domestic product (GDP) is a monetary measure of the market value of all the final goods and services produced in a specific time period, often annually. GDP (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries; therefore using a basis of GDP per capita at purchasing power parity (PPP) is arguably more useful when comparing differences in living standards between nations.
"Net investment" deducts depreciation from gross investment. Net fixed investment is the value of the net increase in the capital stock per year.
In accountancy, depreciation refers to two aspects of the same concept: first, the actual decrease in value of fair value of an asset, such as the decrease in value of factory equipment each year as it is used and wears, and second, the allocation in accounting statements of the original cost of the assets to periods in which the assets are used.
In economics and accounting, fixed capital is any kind of real, physical asset that is used in the production of a product but is not used up in the production. It contrasts with circulating capital such as raw materials, operating expenses and the like. It was first theoretically analyzed in some depth by the economist David Ricardo.
Fixed investment, as expenditure over a period of time (e.g., "per year"), is not capital but rather leads to changes in the amount of capital. The time dimension of investment makes it a flow . By contrast, capital is a stock—that is, accumulated net investment up to a point in time.
In economics, capital consists of assets that can enhance one's power to perform economically useful work. For example, in a fundamental sense a stone or an arrow is capital for a caveman who can use it as a hunting instrument, while roads are capital for inhabitants of a city.
Economics, business, accounting, and related fields often distinguish between quantities that are stocks and those that are flows. These differ in their units of measurement. A stock is measured at one specific time, and represents a quantity existing at that point in time, which may have accumulated in the past. A flow variable is measured over an interval of time. Therefore, a flow would be measured per unit of time. Flow is roughly analogous to rate or speed in this sense.
Investment is often modeled as a function of income and interest rates, given by the relation I = f (Y, r), with the interest rate negatively affecting investment because it is the cost of acquiring funds with which to purchase investment goods, and with income positively affecting investment because higher income signals greater opportunities to sell the goods that physical capital can produce.
In some research, investment is modeled as an increasing function of Tobin's q, which is the ratio between a physical asset's market value and its replacement value. If, for example, this ratio is greater than 1, machinery can be bought at one price and then generate output worth the larger amount that is reflected in its market value, giving positive economic profit.
Tobin's q is the ratio between a physical asset's market value and its replacement value. It was first introduced by Nicholas Kaldor in 1966 in his article "Marginal Productivity and the Macro-Economic Theories of Distribution: Comment on Samuelson and Modigliani". It was popularised a decade later, however, by James Tobin, who describes its two quantities (1977):
One, the numerator, is the market valuation: the going price in the market for exchanging existing assets. The other, the denominator, is the replacement or reproduction cost: the price in the market for newly produced commodities. We believe that this ratio has considerable macroeconomic significance and usefulness, as the nexus between financial markets and markets for goods and services.
Market value or OMV is the price at which an asset would trade in a competitive auction setting. Market value is often used interchangeably with open market value, fair value or fair market value, although these terms have distinct definitions in different standards, and may or may not differ in some circumstances.
The term replacement cost or replacement value refers to the amount that an entity would have to pay to replace an asset at the present time, according to its current worth.
In some research, investment is modeled as an increasing function of the gap between the optimal capital stock and the current capital stock. Here the optimal capital stock is modeled as that which maximizes profit.
A government budget is a financial statement presenting the government's proposed revenues and spending for a financial year. The government budget balance, also alternatively referred to as general government balance, public budget balance, or public fiscal balance, is the overall difference between government revenues and spending. A positive balance is called a government budget surplus, and a negative balance is a government budget deficit. A budget is prepared for each level of government and takes into account public social security obligations.
In macroeconomics, Aggregate Demand (AD) or Domestic Final Demand (DFD) is the total demand for final goods and services in an economy at a given time. It is often called effective demand, though at other times this term is distinguished. This is the demand for the gross domestic product of a country. It specifies the amounts of goods and services that will be purchased at all possible price levels.
The accelerator effect in economics is a positive effect on private fixed investment of the growth of the market economy. Rising GDP implies that businesses in general see rising profits, increased sales and cash flow, and greater use of existing capacity. This usually implies that profit expectations and business confidence rise, encouraging businesses to build more factories and other buildings and to install more machinery. This may lead to further growth of the economy through the stimulation of consumer incomes and purchases, i.e., via the multiplier effect.
Output in economics is the "quantity of goods or services produced in a given time period, by a firm, industry, or country", whether consumed or used for further production. The concept of national output is essential in the field of macroeconomics. It is national output that makes a country rich, not large amounts of money.
The national income and product accounts (NIPA) are part of the national accounts of the United States. They are produced by the Bureau of Economic Analysis of the Department of Commerce. They are one of the main sources of data on general economic activity in the United States.
An open economy is an economy in which there are economic activities between the domestic community and outside. People and even businesses can trade in goods and services with other people and businesses in the international community, and funds can flow as investments across the border. Trade can take the form of managerial exchange, technology transfers, and all kinds of goods and services.
In economics, a country's national saving is the sum of private and public saving. It equals a nation's income minus consumption and the government’s taxes levied.
The net domestic product (NDP) equals the gross domestic product (GDP) minus depreciation on a country's capital goods.
Consumption of fixed capital (CFC) is a term used in business accounts, tax assessments and national accounts for depreciation of fixed assets. CFC is used in preference to "depreciation" to emphasize that fixed capital is used up in the process of generating new output, and because unlike depreciation it is not valued at historic cost but at current market value ; CFC may also include other expenses incurred in using or installing fixed assets beyond actual depreciation charges. Normally the term applies only to producing enterprises, but sometimes it applies also to real estate assets.
In economics, aggregate expenditure (AE) is a measure of national income. Aggregate expenditure is defined as the current value of all the finished goods and services in the economy. The aggregate expenditure is thus the sum total of all the expenditures undertaken in the economy by the factors during a given time period. It is the expenditure incurred on consumer goods, planned investment and the expenditure made by the government in the economy. In an open economy scenario, aggregate expenditure also includes the difference between the exports and the imports.
Gross fixed capital formation (GFCF) is a macroeconomic concept used in official national accounts such as the United Nations System of National Accounts (UNSNA), National Income and Product Accounts (NIPA) and the European System of Accounts (ESA). The concept dates back to the National Bureau of Economic Research (NBER) studies of Simon Kuznets of capital formation in the 1930s, and standard measures for it were adopted in the 1950s. Statistically it measures the value of acquisitions of new or existing fixed assets by the business sector, governments and "pure" households less disposals of fixed assets. GFCF is a component of the expenditure on gross domestic product (GDP), and thus shows something about how much of the new value added in the economy is invested rather than consumed.
Gross private domestic investment is the measure of physical investment used in computing GDP in the measurement of nations' economic activity. This is an important component of GDP because it provides an indicator of the future productive capacity of the economy. It includes replacement purchases plus net additions to capital assets plus investments in inventories. From 2002-2011 it amounted to 14.9% of US GDP, and from 1945-2011 was 15.7% of GDP. Net investment is gross investment minus depreciation. Of the four categories of GDP it is by far the least stable.
In macroeconomics, the twin deficits hypothesis or the twin deficits phenomenon, is the proposition that there is a strong causal link between a nation's government budget balance and its current account balance.
Intermediate consumption is an economic concept used in national accounts, such as the United Nations System of National Accounts (UNSNA), the US National Income and Product Accounts (NIPA) and the European System of Accounts (ESA).
Aggregate income is the total of all incomes in an economy without adjustments for inflation, taxation, or types of double counting. Aggregate income is a form of GDP that is equal to Consumption expenditure plus net profits. 'Aggregate income' in economics is a broad conceptual term. It may express the proceeds from total output in the economy for producers of that output. There are a number of ways to measure aggregate income, but GDP is one of the best known and most widely used.
The Keynesian cross diagram is a formulation of the central ideas in Keynes' General Theory. It first appeared as a central component of macroeconomic theory as it was taught by Samuelson in his textbook, Economics: An Introductory Analysis. The Keynesian Cross plots aggregate income and planned total spending or aggregate expenditure.
The annual United Kingdom National Accounts records and describes economic activity in the United Kingdom and as such is used by government, banks, academics and industries to formulate the economic and social policies and monitor the economic progress of the United Kingdom. It also allows international comparisons to be made. The Blue Book is published by the UK Office for National Statistics alongside the United Kingdom Balance of Payments – The Pink Book.