The study of inflation involves several specialized terms and concepts that describe how price changes interact with employment, economic growth, and government policy. Based on the sources, here are the key concepts and terms related to inflation:
Economic Conditions and Policy Terms
- Stagflation: This refers to a difficult situation where there is an increase in inflation alongside high unemployment and slow economic growth
- It often leads to a “policy logjam”; if the government lowers interest rates to decrease unemployment, it may cause inflation to rise further, but if it raises rates to fight inflation, unemployment may worsen.
- Reflation: This is a policy of providing fiscal stimulus to recover from a recession. It involves an expansionary fiscal policy where the government increases the money supply, lowers taxes, and increases public expenditure to boost demand and encourage industry to produce more.
- Crowd-in Effect: Often associated with reflation, this occurs when increased government spending on infrastructure (like highways and schools) raises the demand for raw materials and creates employment, signaling the private industry to increase production.
- Open Inflation: This occurs in a free market economy where prices are not controlled by the government or a central authority. In this system, prices fluctuate naturally based on aggregate demand and supply.
Measurement and Statistical Concepts
- Core Inflation: This measures the non-food and non-energy inflation in an economy. Because the prices of food and energy (like crude oil) are highly volatile due to factors like rainfall or geopolitics, they do not reflect the exact nature of underlying price rises; therefore, they are excluded to provide a more stable picture.
- Base Effect: This refers to the impact that choosing a specific reference point (basis point) has on the result of a comparison. For example, even if the absolute increase in a price index is the same (e.g., an increase of 10 points), the percentage rate of inflation will differ depending on whether the starting index was low (110) or high (200).
- Phillips’s Curve: Propounded by William Phillips, this curve illustrates an inverse relationship between inflation and unemployment. It suggests that as inflation rises, unemployment decreases. However, the sources note that in the long run, this relationship can break down, as sustained inflation can lead to stagnation and job losses.
Gaps and Spirals
- Inflationary Gap: This is the difference between real GDP and potential GDP when the economy is at full employment. It occurs when demand for goods exceeds production—often due to high government spending or trade activities—causing the real GDP to exceed potential GDP and pushing prices higher.
- Deflationary Gap: The opposite of an inflationary gap, this occurs when potential GDP is higher than real GDP, indicating a point of contraction. Reduced demand leads to lower production and a decrease in prices (deflation).
- Inflationary Spiral (Wage-Price Spiral): This is a “virtuous cycle” (or vicious, depending on the perspective) where rising prices lead workers to demand higher wages to meet their cost of living. These higher wages increase production costs for firms, which then raise prices further to compensate, continuing the cycle.
Financial Impacts
- Inflation Tax: This is the adverse effect of inflation on people who hold cash. As inflation rises, the purchasing power of static currency falls; if that money is not earning interest, the number of goods it can buy consistently decreases, effectively acting as a tax on the holder
- Inflation Premium: This is a concept used to calculate the return on an investment. It represents the “bonus” brought by inflation to borrowers, who benefit because they repay their debts with currency that has a lower real value than when they originally borrowed it.
To visualize the Phillips’s Curve and Stagflation, imagine the economy as a juggling act: normally, the juggler can easily keep “low unemployment” in the air as long as “inflation” stays at a manageable height. However, Stagflation is like a sudden gust of wind that drops both balls at once, leaving the juggler (the government) with no easy way to catch one without permanently losing the other.