In: Finance
Inflation is defined as a sustained increase in the general level of prices for goods and services in a county, and is measured as an annual percentage change. Under conditions of inflation, the prices of things rise over time. Put differently, as inflation rises, every dollar you own buys a smaller percentage of a good or service. When prices rise, and alternatively when the value of money falls you have inflation.
The value of a dollar (or any unit of money) is expressed in terms of its purchasing power, which is the amount of real, tangible goods or actual services that money can buy at a moment in time. When inflation goes up, there is a decline in the purchasing power of money. For example, if the inflation rate is 2% annually, then theoretically a $1 pack of gum will cost $1.02 in a year. After inflation, your dollar does not go as far as it did in the past. This why a pack of gum cost just $0.05 in the 1940’s – the price has risen, or from a different perspective, the value of the dollar has declined. In recent years, most developed countries have attempted to sustain an inflation rate of 2-3% by using monetary policy tools put to use by central banks. This general form of monetary policy is known as inflation targeting.
Causes of Inflation
There is no single theory for the cause of inflation that is universally agreed upon by economists and academics, but there are a few hypotheses that are commonly held.
Demand-Pull Inflation – Inflation is caused by the overall increase in demand for goods and services, which bids up their prices. This theory can be summarized as "too much money chasing too few goods". In other words, if demand is growing faster than supply, prices will increase. This usually occurs in rapidly growing economies. This theory is often promoted by the Keynesian school of economics.
Cost-Push Inflation – Inflation is caused when companies' costs of production go up. When this happens, they need to increase prices to maintain their profit margins. Increased costs can include things such as wages, taxes, or increased costs of natural resources or imports.
Monetary Inflation – Inflation is caused by an oversupply of money in the economy. Just like any other commodity, the prices of things are determined by their supply and demand. If there is too much supply, the price of that thing goes down. If that thing is money, and too much supply of money makes its value go down, the result is that the prices of everything else priced in dollars must go up! This theory is often promoted by the “Monetarist” school of economics.
Costs of Inflation
Inflation affects different people in different ways, with some benefiting from its effects at the expense of some who lose out. It also depends on whether changes to the rate of inflation are anticipated or unanticipated. If the inflation rate corresponds to what the majority of people are expecting (anticipated inflation), then we can compensate and the impact isn't necessarily as severe. For example, banks can vary their interest rates and workers can negotiate contracts that include automatic wage hikes as prices go up.
Here is a brief account of the typical winners and losers from inflation:
Creditors (lenders) lose and debtors (borrowers) gain under
inflation. For example, suppose a bank issues you a 30-year
mortgage to buy a house at a fixed interest rate of 5% per year,
costing $1,000 per month. As inflation rises, the “cost” of that
$1,000 per month decreases, which benefits the homeowner,
especially if the rate of inflation exceeds the interest rate on
the loan.
Inflation hurts savers since a dollar saved will be worth less in
the future. Unless the money is saved in an account that pays an
interest rate at or above the rate of inflation, the purchasing
power of savings will erode. This phenomenon is sometimes called
"cash-drag."
Workers with fixed salaries or contracts that do not adjust with
inflation will be hurt as the buying power of their incomes stay
the same relative to rising prices.
Similarly, people living off a fixed-income, such as those below
the poverty line, retirees or annuitants, see a decline in their
purchasing power and, consequently, their standard of living.
Landlords benefit, if they have a fixed mortgage (or no mortgage)
as they are able to raise the rent more each year.
Uncertainty about what will happen next makes corporations and
consumers less likely to spend. This hurts economic output in the
long run.
The entire economy must absorb repricing costs (menu costs) as
price lists, labels, menus and more have to be updated.
If the domestic inflation rate is greater than that of other
countries, domestic products become less competitive.
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